My Ti4200 128MB still does just fine, it's not my main gaming rig but I usually run demo's and other stuff that I don't want hosing my main system on it, and so far it's ran it all. I also use it on EQ when I'm 2 or 3 boxing, so far it's doing very well but there's supposed to be some big upgrade to the game's graphics that might have me tweaking it again.
Bought it when the Ti4200's just came available, and it's given me trouble-free operation since.
(had to replace the fan on it, but that's not the gpu's fault, that's the manufacturer).