I got a couple of AMD XP 3200+'s and looking for MoBo's for them.
The best one, imho, were Soltek sl75frn2-l or-rl. They were fast, and rock stable. the systems I built with them are still running good. But they are hard to find now.
Abit are good, as well as Gigabytes. I would avoid Asus, because their nvidia solution are not really good. They master much more ATI, VIA and Intel chipset, imho.