I am convinced that two monitors are much better than one large one. So far I'm using one monitor, but by the end of this year I plan to buy another one, also a 24-inch one.
1 large one is better imo.
I played on 2x 24" Dell monitors for 5 years. A few years ago I purchased a 32" curved monitor. It is far superior.
Currently l use a 32" & a 24" (but will soon be setting up to have 2x 24's both set up vertically on each side of the 32").
I have another 32" BenQ 4k monitor and I briefly tried using 2x 32" but it is just too much screen space to focus on.
My goal is to run most of my poker tables on the 32in. in the center. Poker lobbies on one of my vertically mounted side screens and then just other random stuff on the other one (ie. Twitch, Facebook, etc.). BUT to get used to running a table management software that can do what I'm wanting it to do (but so far I am not sure if any of the ones available can perform in the manner I'm hoping for (ie. 6 tables tiled in a grid and then stacked 3 tables deep (so in effect 18 tables on the main screen, with potentially a few others on one of the side monitors 'or' 12 tables tiled in a main grid, stacked 2 tables deep for a total of 24 tables on the one main center screen)