How can you recommend curved screens for any professional work? Do you really think editing a flat 2D image on a curved surface is a good idea? Not to mention the "bow tie" effect (with the middle of the screen) that messes with your perception. Jesus...
Also, why 21:9? Because you do realise that having a Wacom tablet (those black things without a screen on them) would effectively give you about half of the surface, right? They're ideal for 16:10 aspect ratios, and maybe even 16:9 if you're willing to sacrifice a small strip at the bottom that you're never going to use, but 21:9? Come on.
And not even one EIZO? Ever hear of BENQ? "The best"? Please.