Briefly; last night (just to test it out) I ran Sniper Ghost Warrior (has lots of dark shadows > looks just a touch washed but, very good overall!), and Crysis 3 (also lots of dark shadows > looked a touch washed as well but, not bad) and finally, Sniper Elite V2 (plain out clear but, too bright).
Sniper Elite V2 was the one that made me decide to turn down the brightness to 40% and the Contrast to 50% (Out of the box they are set to 100% and 70%), after the change the colors were much more clear and vivid. I went back in and ran Ghost warrior and Cry 3 with the W/ the 40/50 settings and they looked STUNNING!!! I literally sat back in my chair and said "oh, hell yeah!"...
The colors are great; Vivid but, but still look Natural.
Best part about this monitor is the Whites are WHITE (as hell) and the Darks are (damn near) BLACK.
As far as light leak it's very - very little. I took some pictures using "checkemon 1.1": No dead / stuck pixels, colors vivid, clear and natural. Also: likely the lowest light leak I've ever seen!
I can't post the pictures here but, if you want to PM me I can send them to your email?
Not to take away from ASUS (have and have had lots of their products > "Huge shout out"!) but, I really think you should go w/ the LG. To be more specific this exact model: LG has others but, the 27EA63V-P is a winner
The only thing at this point is the lack of height adjustment; other then that, it's a solid 5/5 out of every category:
I came in and looked at it when I got home tonight and I really love the super small bezel style. This thing is a beauty to look at as well as use; yesterday I liked it, today I'm starting to Love it !