You will do fine with ether. I have a AMD FX-8120 AMD FX8350 and a i5 3570K all gaming rigs and can tell you that both of my AMD rigs can keep up with my i5 in every way and in every game I have played. I bought into the i5 hype and sad to say that is all it really was. Yes it is a nice CPU but it is in no way better than ether of my AMD FX rigs.
Same boat here I have 2 identical rigs, One in my office I use for work (3d rendering) and one for gaming at home.
I built the core 5 system for gaming.. I ended up bringing the AMD to home.. WHy? Because there is no tangible difference whatsoever performance wise. However, the 8350 runs way colder hence quieter.
So yeah.. I kinda like more the 8350
I forgot to mention both rigs are cooled with custom 212 EVO, the intel still runs way hotter/nosier.