I don't have integrated graphics on these machines, and there is no room for additional cards, and if there was, I would either be putting in another NVIDIA card, or RAID, or 10Gb or the many other things that will actually improve our use of these machines. Also, these are company/org machines, I can't just go putting random ass hardware in them because someone wants to use a window manager.

What you're suggesting may be fine for casual desktop users at home, but in many cases it's simply not possible.