The boards I have used recently in order of best stability;
Gigabyte 7DXR
Asus A7M266
Gigabyte 7VTX
Abit KT7E
Epox 8K7A+
Iwill KK266-R
FIC AD11
MSI K7T-Pro
Asus A7A266
MSI K7 Master-S
note- realize the difference is very small between these boards, my personal opinions under W2K-Pro, utilizing GF3 cards,ATI Radeon, Hercules 4500, 3dfx V5500, and Matrox G400. When it comes to overclocking stability (multiplier settings) I would rate the Gigabyte boards as the best with the Epox and Iwill boards very very close. For pure overclocking the Epox board is the best I have used with the Iwill close behind. Any of the boards would make very good systems, depends on your usage, features required, and price sensitivity.