hey OP why don't you check craigslist and other places to pick up a used fixed gear bike and see if it really feels right to you. I picked up my first bike for $200 for a local mechanic who just like to build and sell bikes. The parts were all decent and I had a blast riding it. After that you can either start to upgrade (with the money you saved by buying used) or sell the bike for the same (or close to same price) and make an informed decision. Plus, when you grow (which you will) you won't be out a ton of money.

Just a thought. Anyway, let us know what you get and welcome!