Single loop? Dual loops? Considering that the 10 series GPUs don't really overclock very far, you won't need much beyond the stock TDP as far as cooling for them. CPU overclock and TDP?
I am thinking of doing dual loops but I haven't really decided on much yet and saving for the setup might even take as long as a new graphics card comes out so I might switch that as well as the CPU. I know I want to cool 2 graphics cards, is there 2 cards that could do better than 2 1080ti's water cooled? If I don't upgrade to i9 I will try to get 4.0 GHz maybe higher.