To clarify,
I have an inexpensive Acer 24" as my menu display monitor -- I chose it simply because it pivoted and it's tough to find 1080P monitors that pivot vertical nowadays. And it is sitting at angle as Doug describes.
What I'm thinking here however, is actually having a pair of matched wide-gamut monitors in addition to the menu monitor, so THREE monitors total! One smaller one for menus (I'd position it to the right), one wide-gamut to display the working image (positioned center), and then a second matched wide-gamut monitor (off to the left) to display the reference image while I'm editing the working file to match it -- the purpose of teh second wide-gamut to replace toggling proof view on and off my working image or having half-image slices up side-by-side on the main monitor while editing. I realize this is an absurdly "gear-aholic" extravagant layout, but curious if anybody is actually doing it.
In reality, I don't edit critically enough often enough to justify the expense, but am thinking it would be an ideal configuration for critical editing convenience if money and space are no object...