the LGA 1156 and 1366 platforms are about dead (x58).
you need to look at the newer LGA 1155 Sandy Bidge (Z68,P67 etc)
I wouldn't buy (new) last years tech if I was building a new rig.
GIGABYTE GA-Z68XP-UD3P LGA 1155 (SLI) same grade as the x58 MB you chose.
Ram 2x2 or 2x4GB G.Skill Ripjaws X or Corsair, Mushkin, DDR3 1600/1.5v
PSU: ok with your pick
Video Card: ok with the 570, but a good 560Ti may save you some $
Case: personal preference