I had hoped this whole FreeSync / GSync monitor deal was dead. Sorry to kind of go off topic but I had hoped we no longer had to worry about that when picking out a monitor and it sure as heck would help you and others if it was gone. What is the deal with FreeSync / GSync in late 2018 and going forth?
I just got an XF270H-B. I like the responsiveness (144Hz/1ms), but unlike the one you’re considering mine is a TN panel. While I’m satisfied with what I got for the money, I’m starting to wish I had sprung for an IPS 1440p display like your choice. That said, the build quality, controls and aesthetics are great.
Gsync is surviving due to the massive market share Nvidia has, once Intel launches GPUs with adaptive sync support g-sync will probably eventually die out, in which case Nvidia releases a driver which makes their cards support adaptive sync.