He said SDR so: VIA KT133A ( what else?, the SIS 735 runs dog slow with DDR, in fact it runs like the SIS 635)
My recommendations:
Iwill mobos based on the KT133A chipset
Epox mobos based on the same.
If you get lucky, an Abit KT7A rev 3.0 that doesn't die in the first two months.
However, if you are looking for a future upgrade path to DDR, then the ECS K7S5A is viable, provided you get
one that doesn't give you problems or die within the first 2-3 months.