Looks like you're put together a pretty great build so far, and at your price point I don't think there's much to add. Two things to mention though, if you plan on overclocking you should probably pick an HSF. The Cooler Master Hyper 212+ is a great one for around $30. Also, if you're not going to XFire in the future then you can get a smaller PSU. A quality 500W will definitely power your system, so you should probably be looking at the 500-600W PSUs, with 600W being the max.