Mac Pro + LG 34WL550-B — doable? Worth it?

Hi, all —

Is anyone out there using LG's ultra-wide 34" display as a primary monitor for their Mac Pro? I'm speccing out a new workstation for video editing here at work (FCPX, AfterEffects, maybe some Premiere Pro) and will be upgrading from a 27" iMac.
Since I'm returning to the world of build-it-yourself options (my last two or three Macs were middle-of-the-road stock 27" iMacs), I'm not sure what video card and monitor combinations would work best for me.
It's a school environment so critical color grading isn't an issue. I just want a decent monitor which would offer a solid, functional workspace primarily for creating educational content in FCP and AE.

Which card would be best to spec? Would a single card feed a 21:9 display AND a second monitor at the same time? Would I need Thunderbolt-to-HDMI adapters for one or both monitors?

Does the LG 34WL550-B take full advantage of the Mac Pro, and vice-versa?

Any input would be greatly appreciated. Thank you in advance.

— Mike