I can't believe you bought that GPU you can get an ATI Radeon 4870 for $150 which is the same as a GTX 260. For $130 you can get a way better GPU. You can also get a ATI Radeon 4850 for $99 which is the same as a 9800GT.
http://www.newegg.com/Product/Produc...82E16814150394
http://www.newegg.com/Product/Produc...82E16814102824
The only thing I would change beside that is the HDD unless you need a 10K RPM HDD like that then go a head. If you don't need it for what you going to be doin then just get 2 500GB HDD and put them in Raid. For that price you can get 2 1TB HDD. I don't see a CPU.