Find some benchmarks between GeForceFX and Radeon 9700 on Linux. Because GeForceFX is better by an fps or 2 in windows benchmarks and from my experience NVidia's drivers are faster in linux so it would be faster by around 10. If price is a big deal i'd go for the Radeon 9700, because it's a few months since it was released and that makes it a bit cheaper.
I once had that holy shit message in the demo once when i put the graphic quality(everything) to the max capability.
[ December 26, 2002: Message edited by: Interscope ]