Based on what you have written, I would be looking at a used 911. 2 wheel drive if its only for summer otherwise 4 wheel drive. Good compromise between comfort for long journeys and track performance and should tick all your other boxes too.

Business trip and chick magnet, there's a tradeoff. For the first, you need a car that doesn't make you look yobbish/proletarian (which is the case for the M3 or GT-R kind of cars) while for the latter you need a car that (even) a girl can distinguish from a family car (so no S4). Three options come to my mind: Mini Cooper S (for the girls...) or a Porsche Panamera/Maserati Quattroporte.

A Mazda 3 manual gear shift. Very nippy and smooth.

Audi RS4 Avant. Slightly cheaper than an RS6, still just as good for taking the skis up the mountain in the winter, but more fun going up the same mountains in the summer due to less size/weight, and just about bland enough to take to client meetings without them thinking you are showing off. Still rabidly rapid. Oh and as it is a little smaller, probably slightly easier to park in town if that matters :-)

If practicality is less important, a 996 Carrera 4S would be top of my list (if you really want to take the skis, you can get a roof rack for it too...)

So far what I have really liked was the BMW Alpina Bi-Turbo with the straight 6. I know that is over budget, but as I stated before, the budget will flex if pushed. The Panamera/Quattroporte are cool, but big. Any more suggestions?

1) Sizeable budget is good - just remember that running costs are higher in Switzerland. Road tax, insurance and fuel being the most visible. 120k CHF will get you pretty much any NEW coupe you fancy.
2) I'll come back to this one.
3) You need something that will handle well - BMW, Porsche or something exotic and Italian.
4) Maybe an M5 could be included!
5) That will remove the Alfa 8c and anything from Maserati
6) Hmmmm

2) 400BHP RWD cars and snow are not suitable bedfellows. Yes you can cope by just switching to winter tyres - but you may find yourself becoming experience with the chains.

For a budget of 120k chf I would be very tempted to put 20-30k into a used 4*4 for winter - and the remaining 90-100k into a pre-owned BMW M3 (or CSL), Alpina B3S Bi Turbo, 911 2S or Aston Martin Vantage.

The RS4 and RS6 are both stonkingly good cars - but both are heavy and lack the "joy" factor that BMW is harking on about.

Mercs follow the same route as Audi. And the Italian stuff it far too fragile.

Worth noting in Switzerland is that you can have 2 cars on 1 pair of numberplates. You will only ever be able to drive 1 car on the road at a time - but you'll only pay 1 lot of insurance and road-tax.

All 4 (5) of the cars will be reasonable on the track (the Alpina less so) - and suitably enjoyable on the road. The Alpina will be the most comfortable for long journeys.

EDIT: B3 Saloon for 80k chf on Autoscout - black with light cream leather - looks very nice.

Personally, I would pick the M3 over the Alpina. It looks better imo - would expect it to also have a better resale value. You can get a very good pre-owned one for around CHF 100K. Don't buy a new car if you know that you're staying for a limited time only. I think that the M3 (coupe or convertible) is still the best compromise between sportiness and comfort. If you look for a real, pure sports car then a Maserati or Aston Martin would be my picks - but those are not really suited for driving in winter and have very high running costs. If you're >100kg you won't be happy in a 911.....

BTW: Switzerland has the highest density of Ferraris in the world and the highest average bhp/car in Western Europe - so don't let those tree huggers get you down!

But do people have expensive cars because they are fun to drive in Switzerland or because they are status symbols? And if they are just status symbols aren't they a huge waste of money?

I wouldn't say it was the most beautiful design but it is overall a well built quality performance car.
I tested the Audi R8 and the Porsche Carrera 2S and decided that the Porsche was the better of the two for Switzerland plus you have two extra seats that can be used on occasions.
Here is Top Gears comparison.
http://www.youtube.com/watch?v=oaENG1vt6-Y

Assuming that was a genuine question as opposed to something slightly sanctimonious, why would having the car in Switzerland reduce the fun factor? Have you seen the roads we are blessed with here?

Just bought an LP560 spyder for my wife, and a Scuderia 16M for me. Can't think of many more wonderful places to have such cars when the sun's out. Or even when it's not; we drove 7 passes the other weekend - glorious.

To the OP, I'd look at an R8. You could have had my 997 GT3 gen 2 but that's now sold

Reading your comments and the posts on here.

I would say go for the BMW M3.

You cannot justify the extra dosh for the Alpina BMW and the depreciation is much more than a standard BMW as is servicing.

Alternative is the Audi RS3 or Audi RS4 or VW Golf R32.

I wouldn't touch Mercedes.
I wouldn't touch Italian (Alfa etc); beautiful designs BUT unreliable, poor build quality, high depreciation.

BMW? Way to common. Every other minority here has one.

Mercedes/VW? Yes, for my retired father in law and possibly grandpa. If it's a caravan of those than it's for my grandma.

Since you are not searching for an everyday car, Porsche would be an excellent choice. Fun, always appreciated, simply Porsche. Masserati as well. What's left is choice of model, year...But I personally wouldn't go with common brands like Audio and the people's car for this occasion...

I just test drove an M3...WOW! I think the interior/exterior is very plain, but I E-mailed Alpina, and for what I think is a very reasonable cost, they can take the car and completely redo the interior and alter the exterior. What they said I can do is have the factory send them the car, they redo the interior, and send it on to me in August! Was someone pulling my leg when they said that I can have 1 number plate for 2 cars? That way I can buy a cheap 4x4 for winter, and it would seem that my problem is solved! I am still going to test drive a couple more cars to see if I like them better...including: the Maserati, the R8 and the 911. I think that the Maserati will be ruled out for quality issues and the 911 for size issues (I'm a big guy) but who knows?
Thanks for all the help so far! Thanks-M
PS the Alpina package I would buy would only affect the looks and I think make it a bit more unique. Opinions?

Go for the Alpina but for the interior only. Alpina does amazing leatherwork and stitching of a far more expensive car. I believe the way it works here is that the number plate is linked to you not the car, so you remove them and affix to whatever you're currently driving.

First 3 year depreciation on an Alpina is greater - after then - unlikely. For example B10 prices haven't moved in 3 years.

As for servicing, the Alpinas are closer in cost to their engine based siblings - and not the M cars. The only parts that are expensive are Alpina specific ones.

Unlike the M cars which have M-parts for everything - at M-cost.

Mind you, what do I know? I only own one of each

dude get like something with 12 cylinders and like 20liters/100km fuel economy...make sure you like pimp it and like spew 400g of Co2...it will be like soook awesome

The number-plate is yours but also registered to your car. You can have up to two cars linked to one number-plate. The German term for this is "Wechselnummer" or "Wechselschilder". You pay road tax and 3rd party insurance on the more expensive of the two cars, plus a small fee for the wechselschild-option iirc. If you opt for 1st party insurance, you'll have to take it out for each car serparately.

You will need to rent a parking space or garage though, as you are not allowed to park a car without number-plates in a public space.

Common beginners' mistake: Hop on "the other" car and forget to change the plates over. Gets you a nice little fine

Maybe this is like swearing in church but,
how about a Corvette Z06 ? Clarkson liked it if I remember correctly
and they are pretty cheap ($100K), can still get an additional 4x4...

http://www.us-carconnection.ch/

I haven't been to the USA; but your roads in the USA look a lot wider than the roads in Switzerland which are narrower than a lot of the roads in civilized western Europe. Some of the roads in the villages are narrow as are some of the roads through the alps which means having a fast but wide sports car isn't so quick when you have to keep slowing down for oncoming traffic.
That is the reason I would not buy, say, an Audi R8 over a Porsche 911 as it is much wider as would be the Maserrati or a Ferrari or Corvette.
Hence saloons, I would not buy anything bigger than a 3 Series BMW, Audi A4, Golf.

One thing that has been neglected - is that we are all talking about fast cars. There is as much fun hustling an underpowered car than there is an effortless blast in something with 400ps. I had enormous fun over the passes last year in a 1989 BMW 525 - automatic. 170ps of slushed mayhem - but it does have a sweet chassis - and great steering.

Then you bring weight into the calculation - a 1300kg car is far nicer companion for an Alpine blast that a 1700kg car. The latest M3 cab weighs in close to 1900kg!!!

The M5 and M6 are big cars - and they feel it - despite a sledgehammer approach to performance.

If I had space in my garage for another fun car (the next car I will buy is a classic - so it would be the one after that) I would be tempted to buy an E30 M3. They are now expensive to run - especially if you need an engine rebuild - the chassis and balance is so sweet - it begs to be driven with a little tail angle. It challenges the driver to step up - which gives more pleasure than absolute speed.

Try driving a 20 year old 911 - then try and drive it quickly - and you realise how easy modern cars are to drive quickly. Do you want to go fast? Or do you want a challenging enjoyable drive??