I just upgraded my home PC. Huge upgrade - 2.5ghz 1 gig RAM 6800 GT to a 3.4 ghz 2 gig RAM 1800XT.
I loaded up Battlefield 2, and it is such a massive improvement. 1/2 the load times, everything on HIGH @ 1280X1024 and butter smooth.
I played the hell out of this on my old rig, but it's like a new game now. I can't believe how much more fun it is with a constant smooth framerate.
So, it's Battlefield 2 and Special Forces for me this week.