I’ve ended up switching things around several times since this post was created lol, but I’ve kinda settled on a horizontal main on the left and vertical secondary on the right. I have two 24" Asus 1080p 144Hz FreeSync monitors.
Eventually I want to get a 27" 1440p 144Hz monitor to have as my main, and then I’ll put the two 1080p screens on the sides.
I still like to mess with my 27" 4K every now and then, because games just look noticeably better on it, but I don’t really like it for anything except games. All the day-to-day stuff needs to be scaled anyways, so 4K is overkill IMO.
And then when it comes to Linux, I feel like 4K is even worse because scaling doesn’t work as well as it does in Windows. I’ll need to keep Windows for several more months due to school work, but eventually I would like to go back to Linux. I even had a good photography workflow going while I was off of school since January and was able to use Linux exclusively up until about a month ago.