I have made a few modifications to the list:
https://pcpartpicker.com/list/HV4JpG
I have two reasons of choosing Intel over AMD:
1. According to this video, the Windows experience on Intel is noticeably faster than the one on AMD. In the same video, he talks about if I am targeting over 100 FPS, then I should go with Intel.
2. From what I know (it might not be true anymore), the Intel motherboards have better quality components than the AMD ones (which can be observed in the price difference between most Z370 and X370 boards).
Edit: About the EVGA that you linked, the guy is kinda critical of the board in the video.
While looking at the GPU prices, I noticed that the price difference between the better variants of GTX 1080 and GTX 1070 Ti is very little, that's why I opted for the GTX 1080. You mentioned that an overclocked 1070 Ti almost matches a GTX 1080, but I can also overclock the 1080 to get better performance out of it.
As for the PSU, the SeaSonic that you recommended has a 120mm fan, and the RM750x that I chose has a 135mm fan, which, if needed, will need to rotate at a lower speed.
Finally, when it comes to the monitor, if I have the budget for a G-Sync monitor, why shouldn't I get one? I have watched many monitor videos before making my decision, and basically all youtubers and writers said that these monitors (PG279Q and XB217HU; the AOC AGON AG271QG has similar characteristics) are the best for gaming.
After checking out reviews of the Thermalright cooler, I have to say that I am impressed that a single-fan cooler can beat the NH-D15. As I feared, however, this cooler still has the same problem that I had with the fan on the True Spirit 140 BW (rev. A), but I decided that a bit of fiddling with it was worth it. I had no issues installing the heatsink, which went effortlessly, just with attaching the clips to the fan was a pain.