First, every article and person I talked to recommends an intel CPU for Arma 3, as the engine tends to run better on Intel because of better single core performance, and those extra cores aren't helping on my 6300 -> i5
Second, I was going to get the 1060 6gb, but when I went to order it the outlet I was going to buy it from was out of stock, and the 1080 was only a tad bit more than what the next outlet wanted -> 1080
Third, I can't find a single source that agrees that its 50/50 CPU/GPU... everyone and their mother from what I've seen (and with my own very limited tests) show that Arma is by far more CPU intensive than GPU.
But hey, we'll have to wait and see.
"Honestly you don't have a say in anything really if you don't know how to OC your gpu. At this point im praying for that 1080 in hopes that you dont fry it."
(I know how to do it, I just haven't bothered too, try reading harder)
So because I never OC'd my GPU, because my main bottleneck has been my CPU for a long time (had the r9 on my last cpu too) I never bothered with OC'ing it, I don't get a say? Hah good one.