MasonZ I built 2 systems last year this time, one 3820 and one 3930k. Both had the Sabertooth MD, 1 SSD each and one 1TB Caviar black HD. One had a single 680, one had 2 in SLI. Both had Corsair 850 power supplies, and ran fine with it, although I did upgrade the 3930k system's PSU just to be sure a week after putting in card number 2.
I'm using the one 3930k system still, just with a single 780 gtx o/c'd up to Titan performance levels, or within 1 or 2 percent at least. I also put in a 4930k cpu in one system, it isn't much if any faster than the 3930k IMO, with either the 680 SLI setup or the single 780.
I think the 3930k CPU and the video card you're choosing is perfect for gaming/cost right now, although the 780 is a lot faster once you clock it up a little, it is far more $ as well, and that 770 is pretty fast for the money, and will perform will in AH2 and other games. Again, my systems have been very similar to your new one over the last year, nearly identical, and I've been very happy. I drove 3 24" 144hz Asus screens for a year with no complaints with both systems, and now a 27" 1440p IPS panel, and it works great as well. You should be pretty happy with that new system once you get it.
