Dear,
I have some experience as I created myself last year 2 companies.
An AG and a GMBH. For an AG you need to deposit 100.000. For a GMBH 20.000. The difference between the companyb types is minimal.
It really depends what you want it for .
I have had great help from the Startzentrum:
http://www.startzentrum.ch/
They are in several cities in CH. I visited them in Zurich. They help young entrepreneurs. Information, networking, access to contacts, office space for starters etc. etc.
From them I got a booklet: GRUNDEN 2.0, with everything you need to know about creating a company. Also including a comparison between GMBH, AG and other company types. And a checklist what to do before and after.
The booklet I have is in German though. Not sure if it exists in English.
Creating the company is easy but as always in CH you must follow the rules and make sure you have all documents when going to the notary. Costs between 4.000 and 6.000 CHF
Happy to help guide you. Just let me know what you want to know.