Over the past several months I have considered building a single speed or fixed gear bike for commuting around town. With little experience in bike shopping and building, I am looking for some suggestions for a quality frame and wheel set. I'm primarily interested in an aluminum frame, and completing the bike for under $300, total. Again, I'm a beginner, and not sure how realistic it is to get a quality frame, along with wheel set, for that price point. Any helps is appreciated.