Personally I find too much vertical screen size to be taxing. This actually surprised me at first. I was using 2x24" for some time, and bemoaned the shift fro

Personally I find too much vertical screen size to be taxing. This actually surprised me at first. I was using 2x24" for some time, and bemoaned the shift from 16x10 to 16x9, since I found the vertical size extremely useful for common tasks like reading documents. I briefly upgrading to three 30" (U3014), but found they were just too tall. To be comfortable I had to have them far enough away that they weren't particularly comfortable even at 1.25x scaling, so I was essentially wasting the extra space. I "downgraded" to 3x27" (BenQ BL2710 - fantastic monitor) and love them. The horizontal real estate is great, since I can angle the side monitors to still be relatively close, and can keep the primary workspace on the main screen. I certainly wouldn't be against 4k for added clarity/sharpness, but I can't see preferring a single 4k display, of any size or quality, to three 27".