I ended up going with 3x 32" 4k's. I find I do wish the sides were a bit narrower, but seems to be the best available at the moment. For multi-boxing, I was splitting 5 accounts across all 3 monitors (2 each on left and right, 1 in the middle). But I didn't like the different aspect ratio on the sides. I ended up just using the center for my "main" and the left monitor for all 4 alts. This leaves the right monitor free for Slack/Discord and whatever else.

I am hoping the 3:2 aspect ratio from laptops catches on and someone makes that aspect ratio into a ~30" size. But then I'll have to redo my display setup again.