With 8mb of L2 cache on these processors, there still pretty handy, have a look for a GA-X38 or48 board, ... maybe a DQ6 if you can find one, DDR2, but there a good board..... there's the DDR3 version (I think the 48). Flea-bay is excellent for researching this type of buy, ... start off by being not too specific and tighten it up if you get too many hits.
Aussie Allan