I've currently got a evga nvidia 8600 GT w/ 1G DDR2
my system board can handle 2 nvidia PCIe cards in SLI
I'm looking for a decent bump w/o spending much more than $200
Single great card?
Two decent cards in SLI?
if it's not too late, I'd recommend going SLI with the 8600GT since that has to be very cheap now (perhaps even getting a used card) -- that will buy you a few months at which point the $250+ cards will have fallen significantly in price. Def check tomshardware video card charts to see what kind of performance bump a 2nd 8600 will get you (basically look at 2x 8600 = what single card).