Well, I should clarify, my point was a 64 bit processor would be wasted with that graphic card. Your talking about uping the price at least 2 to 3 hundered to get some decent use out of it. The most drastic (and easiest to see) changes in speed and performance come from heavy grapic-oriented apps. If your not gonna use the comp for gaming, shit tons of apps, or your on a tight budget, its not worth getting a 64 bit unless you plan on getting a higher end gc. Most apps we use (like word processors) can't go any faster anyways. I used to do a lot of 3d shit and cad work on my pc before i switched majors. I still would if I had a reason to do it anymore.
Edit: Personally, I like NVidia cards better than ATI, but thats mostly because I have games that clock better on NVidia's as well as have alot of programs that use openGL, which NVidia seems to be better at as well.