I use two 24" 1920x1200 screens in portrait mode side by side. That gets me 1900x2400 viewable with a vertical bar down the center. They are IPS panels so the viewing angle is fine in that orientation.
Putting the two monitors side-by-side in landscape or mixed was not going to happen at my desk so this was just sort of a happy discovery. With the nearly square aspect, it fits into the corner where the old CRT used to put it's backside and I still get lots-o-dots to look at.
I usually end up working with 4 windows tiled equally across the two panels, or a document maximized on one side while working on the other.
I spent entirely too much time scaling and cropping an antique world map with the side-by-side globes to perfectly span the two screens with the fold lost in the vertical bar. If nothing else it is a real attention-getter.