Here's my main office setup. Left to right, Top to bottom:
2 Server Monitors KVM'd to 8 physical servers just out of frame to the left in a rack.
old iMac 27inch
24inch, 24inch, 24inch and 17" laptop monitors connected to the laptop workstation.
Some of the assorted testing phones and tablets scattered on the desk.
After the first of the year, I intend to upgrade the Mac and replace one of the 24inch monitors with an ultra-wide one.
There's really no going back to a single (or even double) monitor setup after using this.