Which monitor to choose with 34 diagonal?

Question

Monitors

Hello friends!
Help with the agony of choice. I want to buy a new monitor. I currently have a Dell 24 2560*1440. I do design and layout, so I need three large windows: photoshop, browser and code editor. Doesn't fit on my monitor. I want to change it to 21:9 with a diagonal of 34.
I already went to take the LG WK650, when they opened it, there was a dead pixel, but I would have refused it anyway, since there is the same resolution of 2560 by 1080, the information got as much as in my 16:9. No wonder, however, the resolution is the same.
As a result, after a long choice, I settled on these two models:
1. LG curved for 45 thousand
2. LG flat for 36
I can't understand if I need this curvature!? Is it worth the $9,000 overpayment? You can push yourself, but of course you want to save money. But if you say, those who really work with curved monitors, that this is heaven and earth - then I'll take the curved one.
Help me decide. Everyone in the reviews only plays games on them, but I don’t play games at all. And I don't watch movies. I just work.