Hi. I'm planning my new build and I don't know which processor and motherboard I should get. I'm kind of torn between the 3820 with an ASUS P9X79 Pro and a 3770k with an MSI Big Bang Z77 Mpower. I plan on having two cards in SLI/Crossfire (probably 2 7970's in crossfire). Getting the X79 board and SB CPU, I will have to pay a bit more, but is it worth it? And also, if price were the same, would I notice any performance difference?