Nice link Nut ! Some useful 3D rendering comparisons between Xeons and Athlon MP's: 3D Rendering benchmarks

These benchmarks (not with Maya) show that dual processors increase speed, but certainly don't double it. From these I would only buy a dual procesor system if I was already buying the fastest single processor system available but needed more speed still. Otherwise I'd save the money and go for a single processor system, then use the saved cash to upgrade more frequently.

Pete.