TigerDirect offers the EVGA H55 Socket 1156 ATX Motherboard, model no. 123-CD-E635-KR, for $79.99. This $40 mail-in rebate drops it to $39.99. With $4.89 for shipping, that's the lowest total price we could find by $85. It supports Intel Core i7, Core i5, and Core i3 processors with up to 16GB of RAM. It features 12 USB ports, Gigabit Ethernet, 8-channel audio, DVI, VGA, and DisplayPort video output, and more. Rebate expires March 31.

Update: Shipping in body corrected.