All is good, except:
PSU is ABSOLUTE OVERKILL. You could easily get away with a 500-650 watt PSU, if you absolutely need to be sure for yourself. 650 watt is already overkill, trust me on that. The 7870 doesn't require much juice at all, nor does the 2500K. Save yourself a few bucks on the GPU.
MoBo is not one I would suggest, Asus seems to be having issues in the MoBo department and that one isn't exactly one of the stellar ones that gets special treatment, either. I suggest going with an ASRock Z77 Extreme4 board, should be $70-80 cheaper, and still be better.