If you do video rendering for example, the i7 and 16gb of ram will come in handy. But for gaming, it is overkill. An i5 4670k and 8gb of ram is plenty. Make those changes, get yourself an R9 280x or a GTX 770. That would be a much stronger gaming machine.
I also question that power supply. It has great reviews, but the fact that they only give it a 3 year warranty makes me feel like they know something we don't. If you're not stuck on that one, check out XFX, Corsair (non-CX), Antec HCG, or any seasonic PSU instead.
Edit: just saw you do rendering. The i7/16Gb ram may be the way to go then. I was hoping to find a way to get you up to an R9 280x or GTX 770 for gaming. No big deal, if you find the R9 270x slow, you can always double up in crossfire.