personally I'd just get an i5 4670k since the i7 offers little in gaming, but if its in your budget go for it. amd is more for budget builds so you can put more $$$ to the gpu, I spent around $550 on my pc, fx 6300 and 7870 (tahiti version) going with an i5 I would have been stuck with something like a 7770 or 650.
9xxx cpus from amd are worthless. run too hot, too much power, and they are just OC'd 8350's for a lot more money.