Got my 4K monitor yesterday afternoon, if I was a good responsible person like my wife, I would have let it sit in the box until the weekend to set it up and instead work on more pressing things.  But no I dig into it last night even though I have more important things to work on like a kid on Christmas, had to take my computer apart, put in new graphics card, clean everything, took forever.  Anyway my current setup has the 39 inch 4K monitor in the middle 3840 x 2160, flanked by two 30's on each side at 2560 x 1600 resolution each.  total resolution = 16.5 million pixels or equivalent to nearly 8, 1080 monitors.  The 4K monitor I chose at 39.5 inches because I can use it at 100% resolution and read everything, no scaling.  the 28 inch 4K monitors the text is too small.

Honestly I need to buy one more 4K to have what I want.  I'll get rid of one of the 30's and use two 4K's and one 30, that will be a total resolution of 20 million pixels