8800gtx and i'm running wonderfully. It doesn't matter what's come out for a while. Still with my triplehead, too. The only game that can still crush it at my ultra-high rez is Crysis. The only problem is that I have to run with an older set of drivers to use all 3 of my lcd's, but that hardly stops me from playing things.
The next card I'm getting is going to be a DX11 card, provided that the new AvP supports it. I honestly do plan my upgrades around certain games or any overwhelming need at the time, like when I pretty much HAD to upgrade from my Athlon700 to a simple, yet effective AthlonXP 2000+. I suppose it would be nice to dump the money I spend on consoles into killer gaming rigs, but some of those damn console games are just too sweet to pass up.