It depends too be all honest.
Is it too much for 1080p@60FPS? Definitly
Is it too much for 1080p@144FPS? Definitly?
Is it too much for 1080p@240FPS? Well that "might" be a different story.
However there have been quite some points made that the difference between 144 and 240 is barely noticable for "most people" and unless you are a super competitive FPS gamer it's probably worth it more to go 2K@144FPS than 1080p@240FPS
With this card you might consider a 4K screen as well, though from what we've seen in the doom benchmark you can't expect it to go at 4K@144FPS, I think many well optimized titles will work at 4K@100FPS, depending of course if DSLR works on the game.
All in all, I think anyone here will recommend going higher in resolution, rather then going above 144FPS and some will even recommend you going for a 4K screen, either ways monitors have come down a lot in price, where 5 years ago a 2K144FPS monitor was around 1000$/€ now you can start picking them up around 300 for budget models.