the big question to me is which has the overall cheaper platform?

what's the lowest you can buy a hexacore setup for, assuming you buy the chip for $125?
-what's the power draw

what's the lowest you can buy a i7 platform for, assuming you can buy a 920 for $199?
-what's the power draw

basically, i7 mobos are $$$$$$, is it the same case for the AMD?