Humm... You should check benchmark on Tom's... I think a GeForce would offer better performance in CAD than ATI... But, not sure!
Check through the articles!
-- Would you buy a GPS enabled soap bar?
Yes, Nvidia's drivers perform much better than Ati's for professional cad work.
------------------ Radeon 9500 w/256 bit memory bus @ 367/310 AMD AthlonXP 2000+ 3dMark03: 3439
One thing to consider about the ATI is that I believe it would offer better performance in DirectX9 games (right?). Also, ATI tends to produce better image quality. For current games, a 9500 nonpro would probably not beat some of those NVidia cards. Check out the benchmarks here: