I got a shiny new upgrade at work that included a Dell U2715H 27″ monitor. My old setup was three 24″ monitors. I have the one on the right turned in portrait orientation for reading long documents. The 27″ monitor replaced the one in the middle. It actually doesn’t look that much physically bigger because the bezel is so much narrower.
I’m really happy with it. The text is incredibly clear and the extra resolution gives a nice amount of extra real estate. I still think that a 30″ 4K monitor could be the ultimate desktop display but it will be a while before the price on those comes down.