I don't have much to add other than to say I am currently looking at both of those AND
Micro Center - Viewsonic VX2753MH-LED 27" Widescreen LED Backlight LCD Monitor VX2753MH-LED which has a 1ms response time vs the 2ms of the others. Dunno how good they are as I am not yet on the monitor buying phase of my new build and haven't extensively looked at reviews.