If you want some anecdotal data, I picked up 2 of the Asus ProArt 5K 27" monitors. I've been using them for about a week now, coming from a pair of old Dell 4K 27" that I used for years.
The matte is a bit more aggressive than my Dells, it works great for me since I get a ton of direct light in my office. There is a bit of grain that is really only noticeable to me on a white screen and being close up. I will say it does an incredible job at reducing any reflections. If you are used to glossy screens or prefer that, you might have an issue with this. Kind of depends on your sensitivity to this sort of thing.
Color and brightness are fantastic out of the box, most reviews also make it a point to mention this. Brightness is also undersold at 400 nits, a couple reviewers got at least 560 when testing max brightness. In my well lit office, I don't ever have to go past 70% brightness.
Build quality is fine. I have them both on VESA arms so I never messed with the stands given.
Compatible with a Thunderbolt 4 dock, DDC/CI works with brightness and volume (better display/monitor control)
They are great no frills monitors, I wanted 5K badly for years but couldn't afford the cost since I need two (software engineer). I got them simply since they are the cheapest 5K option and probably will be for the foreseeable future. To me monitors aren't something I need to get excited about, quite the opposite. They are tools that just need to work, be resilient and fade in the background. Which by my account, this monitor does pretty well.
Note:
The ViewSonic 5K just released the other day (
https://www.viewsonic.com/us/vp2788...wWblsxiK_Gm68Q24z-e7oE_ZQZKBGtoP7ghLnu43KueOE)
Thunderbolt 4 and all for just $50 more, seems like a deal. However my biggest issue is that it requires an external power supply. I know it's a silly qualm but to each their own.