If you live in the US I recommend using newegg.com, they usually have good deals on hardware.
Id go with a C2D if you have the money, but if not that processor should work well as well as the other parts you have, though if you have the extra money get a 7900gs or wait till the 8600 cards come out, which apparently should be soon.
btw whats your budget?
C2D and 7900gs means nothing to me..
C2D is the Intel Core 2 duo. He wants you to Motherboard RAM and Processor to Run Intels Core 2 duo setup
http://www.ebuyer.com/UK/product/125739- the motherboard i believe there refering to sorry if im wrong
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