Virtually every mobo on the nForce4 chipset will get you a stable comp...
Non-SLI: MSI K8N Neo4 Platinum, EPoX EP-9NPA+ Ultra, Asus A8N-E (Deluxe)...
SLI: Asus A8N-SLI (Deluxe, Premium), MSI K8N-SLI...
EDIT: It's actually rather a matter of picking the most features for your money... So I'd say any mobo is good...