Lowest Power Board to run Vortexbox

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Can one the experts on this forum tell me which low power consumption motherboards can run a fully functional Vortexbox server with SBS support while still maintaining a zippy user interface?

 

I was about to build a mini-itx Vortexbox system around an Intel D510 MB, but that MB consumes as much as 25W and may be overkill for this application. As the system will be on 24/7 I'd like to go as green as I possibly can.

 

Any suggestions for an under 10 W board? Will the Alix boards that consume under 5W run the full Vortexbox package?

 

Thanks in advance.