Thanks, I don't know much about how to maintain a bike. In the past I only bought pretty run down cheap ones that I wouldn't care about whether they got nicked (I used to live in London)... and they shops there usually did anything for a 5er. I've got some shoes and funny clothing that should fit (from spinning)... not sure about 70k... might be a little ambitious? How long does that take?

The problem I have with used ones.. if I buy a nice expensive one that's supposed to last a bit longer, I don't know anything about them. There are about 6 different versions of the Cannondale Bad Boy and I haven't got a clue what makes them different, apart from their price tag. I would need someone to explain all that stuff to me so I could actually decide whether I need it or not. I don't even get the whole geometrics of how high something has to be or what... and then all the tyre sizes and stuff. It drives me insane. I'm quite short 5"2 and I have problems with a lot of bikes as they are quite big.... that's all I know. So, for me, it's sometimes easier to go into a shop and try the bikes.....