I am not a fan of NVIDIA chipset (except NForce 4 which was great).
I had too many issues with NVIDIA motherboards that left a bad taste in my mouth.
Nforce4 bugs that I know of:
Active amour bug
Wake on LAN bug
The notroious bad PCI bus(sound crakeling) where Creative got all the balme for NVIDIA crappy chipset:
http://www.rme-audio.de/english/techinfo/nforce4_tests.htm