What I already have:
a Dell U2412M, which is 1920 x 1200 at 60 Hz 300 cd/m² 82% color gamut
a RX580, but I don't do much PC gaming although I might do more if I had a three monitor set up (the dream!)
and I recently got, by way of contrast, a 43 inch 4K Roku Series 4 TV, which maxes out at 250 nits, way below par for the technology, I know, but the difference is still a discernable and pleasant upgrade.
So I'm not sure if the contrast or the color accuracy is more important to me. I am also not sure I would like the curved monitors. I do want more desktop space for multitasking, a window for an online game, a window for social media, one for reading books, one for composition and note-taking.
This LG is HDR600 @ $500
This Samsung is 1440p @ $450
(looks "considerably better in sRGB" than in psuedo-HDR, one customer says)
Amazon.com: Samsung C27HG70 27" HDR QLED 144Hz 1ms Curved Gaming Monitor with FreeSync (C27HG70QQN): Computers & Accessories
www.amazon.com
This Acer is 1440p VA 95 sRGB @ $500
Amazon.com: Acer Nitro XZ342CK Pbmiiphx 34" 1500R Curved WQHD (3440 x 1440) VA Gaming Monitor with AMD Radeon FREESYNC, VESA Certified DisplayHDR400, 95% sRGB, 144Hz, 1ms VRB (Display Port & 2 x HDMI 2.0 Ports): Computers & Accessories
www.amazon.com
Viewsonic has the highest rated 1440p panel on Amazon
but if I'm paying $500 I'm thinking of staying with Dell
https://www.amazon.com/dp/B086H26XWV