Perfecto if you can snag the 8800gt over the 9600gGT please do i mean alot of places have sales for it for 99-125 dollars it will be worth it specially if you game its just the market value of these cards are sooo down and the value they perform please try to snag it you wont regret it. You do not game but im sure this card will last you a couple of years if you can snag it for close to the price of the 9600gt or a few dollars more i think it will be worth it. Mine is running nice and strong with overclocks.
And the rest of your setup is good keeping with a budget in mind im glad you did not cheap out on the Hard drive the Seagate 7200.11 500gbs are awesome cool running reliable ones i have 3 of them and will be getting 2 more i use them exclusively when building computers for clients cant say enough good things about them. With yer processor watever you get a good deal on with one of those new 45nm chips will be great cause im sure even if you get the chip you have chosen you can easily push to 2.8ghz the least, im not familair with yer motherboard.