Just thought i'd update on the above, finally got all my parts and assembled tonight. couldn't have been easier!
Both CPU and GPU are overclocked, CPU at 4.64Ghz and +100Mhz boost on the 1080, haven't pushed that any harder yet, it was the first setting i tried and it's fine so far.
Even benchmarking or stressing my CPU doesn't get over 63 and GPU doesn't get over 75!
There is quite a bit of room with the EVGA GTX 1080 Superclocked that i'm pretty sure the FTW would fit perfectly fine and am slightly regretting not getting it and taking a risk, don't quote me on that though.
Overall couldn't be happier!