Well that depends if u are going vor a value system or an overclocker rig ..
if u go for an overclocker rig then I'd recommend the KT133A chipset
if u go for value I'd suggest the MKM33 from aopen cous thats the best value board i've ever seen, built in everuthing, AGP for expansion, 3 PCI slots and NO AMR or CNR. but I dunno if u can find this in non OEM condition ...