Well the Evga card arrived yesterday, and it has not been artifacting like the BFG, so I guess it's a keeper.
So now my current specs are:
Intel P4 3.2 Ghz HT (bottleneck!)
2 GB DDR2 RAM
EVGA Nvidia Geforce 8800 GTX
Sound Blaster X-Fi Platinum
WD Raptor X 150 GB 10k RPM
I took the physx card out since there are no games for it yet, and all it does is add heat.