I am a big fan of the Flanders Scientific monitors. Just buy a Blackmagic Thunderbolt device and add the monitor of your choice. Great set up for the new MacPro. While I have not seen it yet, there is an Asus 31.5 QHD monitor at about $3500 which would be comparable in price to some of the lower-priced Flanders monitors around that screen size. I would presume that color fidelity, etc would be a lot better in the Flanders and certainly the feature sets with scopes, ability to load LUTs etc, are far superior. And before you ask, don't even think of serious grading on your computer monitor.
Ned Soltz