ASUS produces one of the best gaming monitors in my opinion. It doesn't have new fancy stuff like HDR, however that's not a deal-breaker. It ticks all the other boxes such as: 1440p, 144Hz, G-sync, and uses a IPS panel.
PS. With my 1080Ti I can push most games to 144FPS (after some adjustments in the video settings).
Great monitor, but a little pricey (although you can find it on sale from time to time).
Overall I'm very happy with this monitor. After gaming on 1440p, 144Hz, I can never go back to 1080p or 60Hz.
I do have some bleeding in some of the corners, but it's not really noticable. I can only notice it when it's full black screen.