Which Mobo Assy to Which System?

[jedihobbit]

Looking for some thoughts on a major potential systems components swap.

Systems & Function:

YsSMN = backup / gamer / LAN SYS / folding
BHrDx = file & printer server / folding
Kermit = dedicated SMP folder (Ubunto)

Available Mobo Assemblies:

Foxconn A74MX-K / Brisbane 4000+ @ ~3.0GHz
Biostar 939-6100 / Opty 170 @ 2.7GHz
Abit NF-M2 nView / Opty 1210 @ 2.7GHz or higher

So……….. match assembly with system!