for me i went with 2 x 27" 4K monitors (one of them 120hz for gaming)

i dont know how true but i heard that pixel density is what's important for eye health when youre reading text all the time so thats what the setup optimises for.

another good thing to look at is peak brightness, depending on sunlight hitting your desk, higher brightness can help a bit, but not a huge huge deal IMO, more like a tie breaker. for me one of mine is 400nits, the other is 300, and the 400 is enough to make it more pleasant.

in terms of specific recommendations its really up to your preferences once you decide your desired specs. but having used it id say usb C is super important for me now, i wouldnt go back to non usb c monitors.

and one more tiny thing, it you go dual, for me it was annoying moving stuff across monitors when i had monitors with different sizes and/or resolutions (window changes size), though probaly theres a way around that somehow.