Ok, as I'm doing my reading. According to this link. Battlefield 1 Benchmarked: Graphics & CPU Performance
The i7-6700k doesnt have much advantage on the i5-6600k. I was leaning i7 at first since it's only $100 more. But such a small difference in that test.... does it have some PC wizardry in the i7 that will matter a lot more in the coming years?
Unless you're doing things that benefit from the hyperthreading on the i7, an i5 is all you'll need. Shit, im still using an i5-2500k, though it is starting to show its age.