New PC

Here are the specs I'm looking at for my new PC. Please offer suggestions for changes. My goal is to keep the price at or under $550.
Processor/Motherboard: AMD X4 9600 & MSI K9N2
RAM: Corsair 4gb pc6400 (adding more later)
Hard Drive: WD 320gb 16mb SATA
Video: Sparkle GeForce 9800 1gbDDR3
DVD: Lite-on Burner
Case: Cooler Master Elite 330
Power Supply: Cooler Master 500w

Total cost (tax & shipping): $514.91