Looks like a great build for $450; however, I have one suggestion. I'd get this 7600GT
instead of the 7600GS. It's $3 more, and it comes out cheaper after the rebate. And I'd say the upgrade would be worth ~$30 IMO to make, so you're making a good deal. If you've got a little extra money to throw around, you could also get a 7600GT KO
, which is pretty much the same thing with a better heat sink for $10 more. But I wouldn't really worry about that unless you're a mad overclocking fan. The motherboard and processor are of good quality too.
And I can't really see what PSU or case you are planning on getting; maybe I just overlooked it?
Good luck with the build; that's my 2¢.