Tried the LG 38GL950G, 45GX950A and 39GX950B and the U4025QW over a year; the Dell was their favourite, used 80% for Mac productivity and 20% PC gaming, with a little ghosting coming from OLED that doesn't bother them.
“The Dell was my favorite by far, and it's what I'm using today. I absolutely love it. I use it for 80% productivity on my Mac, and 20% gaming on my PC.”