I read Sander's article on the Radeon. It helped me decide to buy. I replaced my geForce2 with the Radeon and I couldn't be happier!
Although it's "slower", graphics seem to look much better and, more importantly, it's 100% stable.
Personal benchmarks w/ 3DMark 2000:
geForce2 on 700 TBird 128mb RAM: 6145 3DMarks
Radeon on 800 TBird 256mb RAM: 4675 3DMarks