If you’re serious about development, consider getting a screen with resolution greater than 1080p. This vertical limitation hurts in the long run, big time.
I’ve been using a 2560x1080 screen for 3 years or so now and while it’s great for gaming and watching movies, any serious application is a bit of a pain in the neck to use - it does feel cramped (or maybe I’m spoiled). Blueprints are even worse since anything moderately complex takes a silly amount of screen-space estate. Not trying to drive you away from 21:9 as there’s no coming back once you’ve tried it; just consider staying away from 1080p.
3440*1440 IPS 100Hz screens are out there but are crazy expensive at >$1000. That’d be the goal if I were to advise. You will not be able to run modern games at 144Hz at that resolution anyway and a jump from 60Hz to 100Hz is still pretty awesome. G-sync brackets are wider than freesync’s, making it easier for the GPU to take advantage of that technology.
Perhaps you can make it happen by getting a beefy 35" 3440*1440 main screen and a single secondary display, a decent 27" (1440p as well) at 60Hz but with good colour reproduction.