at the resolution your talking about, the 1080 is unnecessary, the 1070 will be just fine. Also since you said there would be no overclocking, even with 2 1070s in sli the 750 power supply is a bit much. With no gpu or cpu overclocking the 650 would be enough even with sli.
Again, you could save a bit more by ditching the corsair cooler, without overclocking the 6700 it really isnt going to get that hot even with a bog standard air cooler, so you could save ~60 or so on just getting an air cooler.