I'd swap the motherboard to something that can support AM3+. As of right now this is one that can, and is in your price range.Advance_Alarm said:Buying this tomorrow afternoon.
MOBO and CPU: AMD Phenom II x4 955 Black Edition, ASUS M4A87TD EVO AM3 http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.628393
GPU: GIGABYTE Radeon HD 6850 1GB w/ free Shogun 2: Total War http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.620433
Power Supply: Seasonic 520w http://www.newegg.com/Product/Product.aspx?Item=N82E16817151094
DVD Drive: Lite-On DVD Burner http://www.newegg.com/Product/Product.aspx?Item=N82E16827106289
HDD: Samsung F3 500GB http://www.newegg.com/Product/Product.aspx?Item=N82E16822152181
RAM: 4GB GSkill Ripjaws http://www.newegg.com/Product/Product.aspx?Item=N82E16820231277
Wireless Adapter: TP-Link Wireless USB http://www.newegg.com/Product/Product.aspx?Item=N82E16833704045
Case: Centurion 5 II Black
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128490
I'd also get a 1TB F3. It's $15 more for doubled the space.
Lastly I'd look into getting a different case. The CM 5 was a good cas for its time, but it's not built particularly well, the plastic feels sort of cheap, and it is not easy to work in. I'd spend another $10-$15 there as well. Will make building much more enjoyable imo. (I had one)