Got the LG 4k one one. Looks good. Best part is my 6yr old HD 7770 is able to run 4k Display using display port at 60hz. Color and text and looks beautful, specially if 1080P monitor is kept right next to it, and one realizes what is missing in 1080P monitor.
However considering the price difference between 4k and 1080P anyone on budget is not really missing that much i would say. These 4k needs to come under 15k. I don't feel the current price is that much justified for 24 inch monitor.
Initially used the monitor with hdmi it scaled down to 30hz, found a ytube video and solution arrived to use display port to run it at full 4k with 60hz. Monitor luckily comes with Display cable, which was welcome. Otherwise not sure if i would have kept it or bought a cable for it