Thats a good looking spec.
I'd also grab an M.2 drive of some kind.
That coolers fine, the Be Quiet stuff is very good. I'm actually thinking of ditching my H80i for a Dark Rock Pro as I type due to the noise of the H80i.
I very much doubt the RAM speeds will make a noticeable difference tbh Ab.
What res are you gaming at? If its 1440p and up then yeah, 1080 is good, if you're at 1080p then a 1070 will suffice. But a 1080 would give you some headroom for future titles.
I don't like the case myself, but that is very much personal preference. If it were me and I were building it today I'd go with the
Corsair 400C or the
Phanteks Enthoo Evolv. In fact as I'm a bit unhappy with the volume of my PC at the moment I may well be buying one or the other soon!