Yeah Mat spot on.
I've got an intel chip in my laptop and a AMD in my desktop both work with maya no probs.
End of the day I would go for hte fastest CPU you can get you hands on as the faster the processor the happier maya and you will be!
The intel core 2 duo's are the fastest at the moment, they even do Quad core processors, but they will cost you. You can pretty much guarantee that AMD will fire back soon with something, then intel will and it will go on and on like that.
"No pressure, no diamonds" Thomas Carlyle