One plus for three identical monitors is that you can drag windows across them seamlessly.
The colors will be the same, and sizes will not change. Either can be a distraction.
If you were playing games, then the triple option would be good. It would be distracting to see a bezel in the middle of your gun sights if you had only two.
But for productivity, I would pursue a plan to end up with two large displays.
Buy the best. If you don't buy what you want, you will forever be wondering.
But you can do it, it will work, its all up to you