24" Vertical - Dell U2415 (1920x1200)
31.5" - HP Z32x (3840x2160)
30" - HP Z30i (2560x1600)
Compute:
MBPr - 15" - Mid 2015
HP Z620 (Xeon CPU E5-2620 v2 @ 2.10GHz x 6 Core, 128GB RAM, 512GB SSD

To be honest, the Mac is just a nice ssh console to the workstation that runs Ubuntu.

I was using Ubuntu directly on the workstation, but needed to use things like outlook, lync, and other tools that dislike Linux :(