I've been looking at reasonably cheap 22" and 24" screens, but my problem is that all (cheap) 24" screens have moved to 1920x1080. I'm a little concerned that three of these next to each other will be too wide and thin, as such I'm leaning toward a 3x22" solution.
I'm not sure but from your above statement, what youre asking is, should you go with three 16:9 or three 16:10. I was running three 28" 16:10 monitors and was quite pleased with them. It was a nice balance of height to width. With the new EF ati card I could have run them at their native res of 1920x1200/screen which would have been fantastic in my opinion. Unfortunately I knocked over one monitor and have to wait till I have the money to replace it.
But to give you the short answer, I think that I would prefer three 16:10 over three 16:9 simply because of the height to width aspect. To be honest, I am considering waiting for the six output EF card and planning to try five of the 28" monitors in portrait mode.