Can anyone recommend a good monitor for editing D600 photos?

having just read an article at NoFilmSchool, the Monoprice 27" has got me interested in it.  It's a Korean monitor that uses the exact same panels as the L&G panel found in the 27" iMac.  These are very nice displays and can be had for $390.

http://nofilmschool.com/2013/01/apple-monitor-27-inch-display-monoprice/

But anyway this question almost requires the amount you want to spend and there are all kinds of different monitors at all price levels.  You could also browse B&H "Computer Monitors" (which will be arranged by "Best Seller") and have a look at the reviews.