are you going to overclock?
Newegg.com - EVGA 122-M2-NF59-TR Socket AM2 NVIDIA nForce 590 SLI MCP ATX AMD Motherboard - Retail
booya. i have this mobo and it will run stable over 340mhz htt. and that is impressive, to say the least.
Newegg.com - ABIT KN9 Socket AM2 NVIDIA nForce4 Ultra ATX AMD Motherboard - Retail
booya. i have this one too, i used it before i got my evga.
it will run around 285mhz htt, which is pretty good. the nf4 ultra chipset is a really good, stable chipset. it is a little older, but by no means outdated or worthless.
from my own experience, both of these motherboards are excellent.
"nagasama no longer drinks tecate, or streaks out of the night for anything, and he has a fine wife so he has no use for your girlfriend...she is safe..."