For performance, nForce 2 400/400 Ultra. However, the KT600 is stable and has lots of features. The soltek KT600 board is going for around $78 and it gets you 6 channel sound and onboard SATA/SATA RAID. The NF7-S that has the SATA is $111. However, if you don't want SATA and 6 channel audio but...