Depends on your overall setup too. Some people get better with Radeon, others with GeForce.
Which did you pick in the Voodoo3 vs. TNT2 anyway? I picked TNT2 and my friend picked Voodoo3, at nearly the exact time. We both have the same systems and I still slay him in framerates and video quality.
I'm going GeForce 3 Ti by the way.