At this point, if you absolutely need a new bike, go with something from bikesdirect...they are good bikes for the money and the frames are very upgradeable and should keep you satisfied for a long time. However, if your current bike is fine and you aren't in a hurry for a new bike, I would resist the temptation to buy now and just continue riding around on what you have, continue to think about what you like/don't like about it, and keep reading up on whats out there to buy. I've ridden nearly 30,000 miles on fixed gear bikes and I can tell you that my idea about what works perfect for me is still evolving, albiet at a slower rate then when I was a beginner. If you wait a few months, and keep researching, you'll probably find that you end up getting something thats very different from your initial interests.

The FG bike that I have ridden the most cost me $1200. I've ridden it about 10,000 miles which comes to about 12 cents a mile so far and I'm not nearly done with it yet. Except for a few different saddles and different sized cogs, I've never spent a dime upgrading it because I built it from handpicked parts. If you put a lot of miles on your bike, dropping the cash on a good bike is worthwhile, but you really want to know what you are getting into beforehand, because if you put out a lot of money for a nice bike you may be stuck with it a long time and may end up spending a lot more to get it right. So the bottom line is take your time and don't jump into an expensive bike until your ready. In the meantime a cheaper bike will go just as fast.