I had 27” Dell U2713H, during the week of use I felt an eye pains, thought it was just a weariness but then decided to return it to the seller and purchased Apple thunderbolt display 27”, very satisfied, do not have problems with eye pains.
I’m using 2×1600x1200 (Dell 20”). I think this is best solution
I’m using Eizo FlexScan Sx2262W. It’s great! Unfortunately the price is not low. I paid ~ $1000 If you care about color reproduction is good choice!
i have 2 FlexScan S2431W. nice set up for any design work. i recently bought the second barley used for 150 from old design office which replaces all hardware every 3-4y. best thing about eizo is the 5y warranty, if there are any problems give them a quick call and you have a new screen next day via ups