What you going for now ?
Well, I bought the Dell to avoid the panel lottery but I'd almost be inclined to by a few G Sync 27"s - Acer, AOC, Asus, Viewsonic, LG
Trial a couple, bin the bad backlighters and deal pixels and rotate them until I get one I'm fully happy with and is an obvious improvement over the Hazro.
Gaming the Dell was fine and I got it looking nice. I couldn't get happy with it using Lightroom which tipped the scales into making the decision to move the Dell on.