You could also check out the ultrawides from Dell/LG that have 2160 vertical res. They're $1500-$2000 from what I recall and will help with sharper text The PPI will be closer to what a standard 16:9 4k offers, and though won't be as good as the studio display @ 5k, debatable whether that matters at desktop viewing distance.
Personally I won't be upgrading from my 2x 27" 4k displays until
* I can get 2x 27" 4k with 144hz+ at a reasonable price
* I can get an ultrawide that matches the PPI and is just effectively 2x screen space
Thanks. So I went out and picked up a Studio Display. It's a big downgrade in terms of size obviously, but text is extremely sharp and colors are great. Beyond that, it's more tidy on my desk with the great stand and I can get rid of my external speakers because the built-in speakers are pretty dang good. We'll see how this feels.
Thanks a lot. This makes sense. It's really too bad because ultrawide screen was kind of a game changer to me in terms of productivity. I'm not even sure why it's served me so much better than using dual monitors. It does seem I will need to consider going to back to dual screens.
Personally I won't be upgrading from my 2x 27" 4k displays until
* I can get 2x 27" 4k with 144hz+ at a reasonable price
* I can get an ultrawide that matches the PPI and is just effectively 2x screen space
* 5k+ gets cheaper/commonplace