yup, Ridlyn ripped the words right out of my mouth. Since he has the 9550, he has an AGP slot. The 6800GS on AGP is making it's debut and is just now being sold. There is an XFX 6800GS on newegg for 230 I think. Wait till some more brands come out so you can buy a PNY, eVGA, or BFG. You don't want anything to do with an XFX.
Oh, and as far as improvement: your jaw will drop.
<b>I'm an unhyphenated American.</b>
Intel Q6600 @ 3200 1.4v
Abit IP35 Pro "The Snake"
2x2gb A-Data @ 800
Diamond HD 3870 512mb
Great FORD TRUCK