With that system, the 8800GTS is holding you back badly. Also, I don't think you need to get a GTX580 unless you really want the fastest card money can buy. I would suggest you wait until AMD launches the Radeon 69xx series. This will drive prices down on the current models, and enable you to pick up a slightly lower-spec card (or two) for cheaper. Who knows, if you shop smart, maybe you can afford both the PS3 and a new GPU.