Wow I actually have the 9800 GT and a 650 ps. I haven't had any problems and I can even run another 9800 if I wanted... but nah one is good until the 285's drop.
Meh, just make sure your PSU can handle future upgrades on the 12V rail. Other then that its a good choice, the 9800GT is pretty sweet. Better choices out there but still a good buy i think. You should beable to run the majority of steam games on high
i believe, for what you got, it wasnt a bad purchase. But i guess i dont know what you upgraded from... unless you posted that and i just happened to not remember reading that (sad, i know right) but in any case. I believe it was good