I moved from Intel to AMD when I got my AMD AthlonXP Barton 2500+. Excellent processor, and my Athlon64 3200+ is better

!
I went with the MSI K8N Neo2 Platinum board to maintain my AGP video card (the MSI 6600GT). I have been looking for a 6800GT, cheap, so that I can stay away from PCIExpress for a little bit longer.
It's totally up to as per what you currently already have, what you want to replace, and how much you want to spend

. Another board that you may want to check out is the
ASRock 939Dual-SATA2 Motherboard as it natively (no hybrid junk) supports both AGP and PCIExpress (for example: if you have an AGP card, don't want to get a new one, and want expandability later

). I have heard excellent reviews about this motherboard!