Sorry for the delay in posting this. I tried to do a screen capture but it was too big. Then I had to relearn how to use drop-box, so here you go:
https://www.dropbox.com/sh/07l8o894nlwd2dg/AAC0tWeRuDOn39v5BubIjdsAa?dl=0 The ergonomics are pretty important here. You will notice my control bar is at the bottom because it is uncomfortable to "look higher" an additional 6 inches on the 4k display. The top of the acer monitor is about my eye level, which is optimal.
The black places above the acer monitor and the Vizio 37 tv are there because they only go to 1920x1080.
I'm using HP machine with a Q6600 quad core, 3 gb of ram. The video card is an NVidia GTX 750 TI. It can drive 2 hdmi at 4k and 2 other monitors with dvi. The card only is pretty cheap on amazon, and only requires a 300 w power supply. My monitors are an Acer S27 at 1920x1080 on the left, the LG UHD TV at 3840x2160 in the middle, and a Vizio 37 inch hd tv at 1920x1080 on the right.