I am using a 2500xp M Barton and I am very happy with it... along with 1024mb of PC3200 and the DFI Infinity I would say it kills it's Intel counter part. Its only at 11x200fsb too (2200mhz) ... I am benching 18k with a 9800pro on 3D Mark 2001. Not too shabby for a PC under a grand.
I say AMD for sure.