To clarify my point.
Being that you already have a streetable road bike, you will get your fixed-gear itch scratched at the track for sure. If you are riding hard enough, you won't even want to think about a fixed gear on the street. Seriously. Since I started training and racing at the track I haven't ridden fixed on the street once. Plus you will get frustrated at the slow speeds required to stay safe. Fast riders easily get to 35MPH+ on the track. 35MPH+ fixed on the street is absolutely crazy...even with a front brake.
Step 1: Use the rental bikes until you see what others are riding on the track that you like in your price range. Ask them questions like, "Why did you choose A over B?"
Step 2: Once you've definitely gotten bitten by the track bug, buy a bike that you can grow into. Something faster than you think you are. You'll catch up to it.
Step 3: Cut financial corners by buying a complete bike with a rock solid frame like a Fuji Track Pro or a Felt TK2 and upgrading when things break or when deals fall into your lap. That's assuming you have a moderate budget (not a broke college student nor daddy warbucks).
If you ARE the broke college student, go for a Bianchi Pista, Fuji Track, or Fuji Track Comp.
If you ARE daddy warbucks, go for a Tiemeyer or Teschner and buy your parts a-la-carte.
For everyone: Track racers usually take good care of their gear and sell it relatively cheaply, so used gear is usually a great deal.
Last edited by carleton; 07-14-09 at 09:49 PM.