Need some help upgrading.

[DrususAvantar]

I've got quite similiar question.
My current PC is not bad, but since I put it together myself and do not overclock it might get better. Also, you might have some valuable input on what to change in the future to get CoD run smooth and get max out of it. He're the spec, feel free to berate / comment in any way. Thanks!

Intel Core i7 930 2,80 GHz
Seagate 1 TB Barracuda 7200.12 (32MB, Serial ATA II)
Kingston HyperX DDR3 2X 2GB 1600MHz Intel XMP CL9
EVGA X58 SLI Classified
GeForce GTX 580 OC MSI 1536MB TWINFROZ
Be-quiet Dark Power P7-PRO-850W PSU
CoolerMaster Stacker 832 Black
Saitek X52 Flight Control System
Saitek Pro Flight Rudder Pedals
Razer Lycosa keyboard
Razer Mamba mouse
Razer Megalodon headset
Windows 7 64bit

Drusus