The single best Amithlon mobo Ive encountered is a gigabyte ga-p35-ds3l.
3 pci slots, dual channel ddr-2 1333 support, dma support, supports all core2 (duo and quad) revisions and working sata, and massively overclockable. No need to use kernel4 either, which is handy as it seems to break SetDMA.
Im using one at the moment with a c2d e5300 @ 4.05ghz.
Quite possibly the fastest ever "68k" system
