If you are going with an AMD chip, I would have to advise you not to go anywhere near a mobo using the nForce2 chipset. Personally, I have had nothing but problems with the couple nForce2 boards I had the displeasure of working on. I would have to say the VIA KT400a chipset is the most stable, modern chipset for AMD.

I am not really a big fan of VIA (some problems with early K7 chipsets), but I own a VIA VPSD mobo for my Pentium 4. I must say, it is the best board I have ever owned. Never EVER has it given me crap and it's fast as hell. This is my board. I've had it for about 4 months now. Excellent.