I'll do you one better, The XFX 8800GS(9600GSO is the same thing) $129(99 W/MIR) AND COD4 comes with it So you can give it to a friend or keep it if you don't already have it.
And with the money saved on video, He can get this power supply
Antec True Power Trio TP3-550 550W ATX12V Power Supply with Three 12V Railshttp://www.newegg.com/Product/Product.aspx?Item=N82E16817371002
Currently on sale for 59.99 w/free shipping
And it will cover him for a bit, +12V1@18A,+12V2@18A,+12V3@18A