I moved out to Colorado about a month ago. I am starting to get into riding quite a bit, and have been using my roommates old bike. It is a few year old trek 4100. I will be riding almost all in the mountains, riding up for the amazing ride down. When I use his bike the things I don't like about the ride are that the brakes are not as powerful as I would like, and that it does not take big hits well. It is also hard to control when I get to high downhill speeds with the lose brakes and weak front shocks. I know that it is a bit to small for me because I am 5" taller then him and it feels to small. I have been trying to look around for bikes on the internet to get an idea of where to start, but there are SO many options. If someone could help point me in the right direction it would help. I am looking not to spend more then like $800 and less if I can by getting a last years model, and a friend that runs a bike shop near by (he snowboards, and does not bike so he is not much help). Thanks