This crosses interests between software development, and photography.
I just purchased a new monitor, I wanted a big monitor which would be good for programming, but also a wide-gamut display, for Lightroom and Photoshop.
After doing my research I came up with the ASUS PA-279Q which is just about perfect. It is certified as calibrated to tight tolerances, and covers 99% of the Adobe RGB color space with a DELTA E < 2. This was confirmed with my Datacolor Spyder Color Checker.
It's also a great monitor for programmers 27" with 6 USB ports. The display port connection works great with my MacBook Pro, and the stand allows me to raise it enough so that I can put the laptop with the lid open in front of it and easy use both displays. You can also rotate the display and use it in portrait orientation.
Although it doesn't have Thunderbolt, its a nice alternative to the Apple Thunderbolt Display.
If you don't need such a large display the PA-249Q is a 24 inch display with many of the same features and qualities. It's still 95% of Adobe RGB, but with a Delta E < 3, still not bad particularly for the price.