A pair sounds pretty awesome indeed. I can't even imagine. I remember getting the 27" and noticing I had to move my head left and right to take it all in!
For Logic, I'm mostly looking for more vertical real estate. Time line and editor are below each other in the main screen, then I want the mixer below that and then still more space for the plugin windows. With a 32" 4K at native resolution, vertically, I can see that happen. My 27" is fixed horizontally, though, so I lose a lot of space.
I just built myself a wooden pair of 5U racks that go on top of my desk, with a monitor shelf between them. Planning to kit both sides out with a EuroRack. The 27" is already too wide as it is and extends beyond the intended EuroRack area on both sides. If I go for 32" horizontal, it'll be even worse. Hence the Ergo and the idea of working vertically. Do you have yours horizontal, and on top of or next to each other?
Next step for me is to get a Thunderbolt hub with PD. Main question now is how much the 14" and 16" will require. For example, the Plugable TB hub delivers only 60W. So I'm waiting for the announcement tomorrow to decide on that.