Originally Posted by
the boar
if you are going for 1440p you should forget the 1060, wont be good enough for those extra pixels!
a 1070 will work (it is what i have), but there are also 1070 ti, 1080, and 1080 ti around now. i don't know what the best price per performance is right now, might be some good bargains to be had during the black friday stuff though. hopefully someone with better knowledge about the range can chip in~
for cpu overclocking, i am not sure if i am allowed to link to other forums - but google "haswell overclocking guide <whatever brand of motherboard you have>" and you'll find what you need! but do make sure you have a decent aftermarket cooler, the stock intel one is not so great for this.
upgrading your cpu will cost a lot of money right now, for arguably little benefit (compared to the cost, at least) as you will need a new motherboard and new ram. the haswell i5s are still pretty good (i still have one), and if you can overclock it up to 4.4ghz or so its a nice little boost for the cost of a $30-40 cooler.