Which of these bikes would be best for my price range? Or maybe building from a scratch bike would be good, but I didn't really find anything on craigslist that were probably overpriced.. I will plan on upgrading it, maybe ride brakeless for a couple weeks.. haha. I am not sure of what size to get, but maybe 54cm might do well for my size?

http://www.bikesdirect.com/products/mercier/kilott.htm
http://www.bikesdirect.com/products/.../clockwork.htm
http://www.bikesdirect.com/products/...cane/track.htm
http://www.bikesdirect.com/products/...st_al_carb.htm

http://windsorbicycles.com/track.htm