Not quite what you're asking for, as I only have one monitor. But I recently bought a curved monitor for my personal (non work) computer, and while it's good for gaming, I don't really like it for anything else on the desktop. YMMV, but also think about your use case.
Edit: if this is your reading only rig, curved makes sense if money is no object.
Have you thought about VR? I’d say that’d be the way to go, especially considering a 3x monitor setup would run about the same as an entry VR headset. The big considerations are whether your computer is powerful enough to handle it and how likely you are to get VR sickness though. From my experience after trying VR I don’t think I could ever go back to playing immersive games any other way (sim racing or Digital Combat Sim)
One 32" curved in the middle and two 27" flats to the right and left. And I gotta say that I mostly used the flats because I had one lying around and the other was cheap. Two more curved screens would probably be nicer with my current setup, since the outer edges are quite a bit away from my eyes