Not sure if there is any interest, but I got the titan (NC25/HS) cooler on my Gigabyte Z170n motherboard. Fit is pretty good actually and it looks like the Noctua 120mm slim fan will fit as well. I currently have the super slim Scythe fan installed, but there's a few mm gap between it and the cooler. I might buy one if temps and noise are an issue. I have yet to do any stress testing since I still need to put on my hard drives.
I also borked my PCIE riser key, but I don't think that'll affect temp. testing at all. Oh, and I'm running a non-k i7-7700. If temps are especially good, I may run a K version, but I don't see the need to as it is my work computer and I don't run any demanding programs on it.