i guess you are not a minimalist lol
i would go with a nice 1920*1200 main screen, with another screen (same size or smaller) with DVI + VGA inputs.
hock up main screen and secondary via DVI to main screen, get cheap and old VGA and PS/2 or VGA and usb KVM and use that to connect the secondary to the other machines.
this way, all you need to monitor all the boxes is to simply toggle the input on your secondary (move all work to your primary screen, or disable the secondary on your primary rig) and then toggle the KVM (best to get one that responds to a special key combo in case if you can't physically reach it rofl).
that would mean only 2 screens controlling lots of computers and less get up and walk time and clutter.
just me tho.