I've used a 27" Korean 1440p 120hz monitor for the last 2 years and it has been great. I bought it mainly for gaming but it of course is fine for other tasks. Although it's a 120hz monitor I only have it running at 110hz because I use a 2m DVI-D cable and it doesn't work  at 120, it was fine on a 1m long cable though.

The specific model is X-STAR DP2710 with a Samsung PLS panel. It's pretty much featureless with only 1 DVI input and no on screen controls but it performs amazingly considering what I paid for it (NZD$380) and it had no dead pixels when arrived!