I’ve only bought one monitor in over 10 years so i have none for comparison.
But i can say avoid Dell, the quality control sucks (this is the 4th monitor, the 3 previous replaced under warranty) and their customer service is extremely outsourced and feeble and a headache to deal with.
Still using my HP 2159 21.5 inch monitor. I am not looking for a replacement, as it still works fine for my needs.
As I said above, I use an LG 43” 4K screen at work and I like it a lot.
Tips:
High refresh rate and low-blur is important to me, so several years ago I scored a Dell 2716DGR on sale at Micro Center. Now it over 2X as expensive as what I paid!! 
No way I’d buy it for that price, but glad I stepped up to 1440p when I did.
With slight tweaking of the RGB balance it has scored fairly well on color for a TN display when tested, and the viewing angle is well within what I need for a monitor that I stay fairly close to when using it.
Absolutely no way I would go back to 60hz unless absolutely necessary. The monitors at work seem atrocious now in comparison after years of using 120hz+ at home.
Is your primary application gaming or productivity? I plan to upgrade to a higher refresh rate for gaming at home eventually. I don’t see how it would help me at work though.
What a coincidence topic, one of my 4yr old Samsung monitor went quietly dead on me yesterday. Display was well taken care of.without a single dead or dark pixels. Strangely, they were no tell tale signs of failing either. 
Does it show signs of getting power? I’d swap out the power supply and use a different outlet just to be sure it is truly dead.
Got the high-refresh/low latency for gaming, but it just feels so much better for everything else too. Like going from a constant current light to one with pretty bad PWM honestly. Once you’ve experienced the better one you can’t help but constantly notice the difference when going back to the worse, even if it’s not really a “usability” issue.
Doesn’t help at work that the mice they have hooked up on several machines have the feet super worn and seem to have terrible sensors. I really do have problems clicking on small buttons, etc. sometimes lol
I’m really leaning toward a 49” 32:9. I don’t do much gaming or watching movies and I’d love to be able to have a few massive spreadsheets and two code editing windows
The SYSADMIN for the company upstairs has one like this. He thinks the purchasing Dept. had a moment of weakness to let him get one.
Lets him keep track of the various goings on and has plenty of room for coding and testing.
I’ve got a 32” Cheap Toshiba 4K with a pair of 1600x1200 in portrait mode one on each side.
I must say, that once you have a bunch of pixels to play with, it’s hard to go back to a smaller display.
So many Windows to work in - So little time….
And at last Windows can (almost) scale a screen as well as Mac or Linux has be able to do for years.
All the Best,
Jeff
Noticed quite a few new 27" monitors FHD recently selling at very affordable pricing which makes me wondering. Glad i have done my homework before ordering one. "Black smearing" behavior is just as bad as low PWM for flashlight. 
I adore the Razer monitor I purchased; it is the greatest I’ve ever had in terms of overall quality, value for money, performance, and aesthetic. I truly enjoy it, and despite owning far more costly units in the past, I would not swap it for any of them. Also, 27” is, in my opinion, the sweet spot for single-player games as well as general productivity.
Zoho Developer at Techloyce.com
I am using an Acer 27” FHD. I bought it with some discount that came with my purchase of an Acer notebook computer.
Based on my experience, when in doubt, get a larger monitor than what you initially wanted. Check whether your PC or notebook computer has the necessary technical capacity to deliver better colours beyond full HD.
Curved monitor is unnecessary if you are not a gamer.
And usually, a better monitor at about the same price will emerge in just about two years. So, no need to invest too much.
U4320Q is what I have, but I wouldn’t suggest buying it unless you’re buying a calibration tool with it.
The real contrast is only 600:1 and greys were red prior to calibration. Native color is almost pure blue @ 11,000k or higher.
Whatever you do, never buy OLED. Mine burned after 2 months, Linus’ burned after 6.
It took me months to sell it for $250. I’m still pissed off. OLED should be illegal or price fixed @400.
Generally speaking, you’ll probably want a curved screen if you go larger than 43, unless it’s microled or oled. 4k isn’t worth it under 40 inches.
I’m thinking hard about getting a 49”. Believe it or not, I find myself running out of space on my 34” for doing database stuff and working with large spreadsheets
I’ve always gone a bit overboard with high pixel count and screen size. Currently have 32” 4K (3840x2160). Would go higher but almost everything larger sacrifices vertical resolution (its less than 2160). Every once in a while I consider some kind of 3 monitor setup but I’d have to redesign my room…and there’s the wife factor to consider 
There’s a couple of “5K2K” (5120x2160) monitors that look kinda nice, but I’m not sure they’d be worth it, and the games I play might not support the aspect ratio (21:9), that and my eyes aren’t what they used to be
If I the room for a large projector screen or two (I don't), I would probably get a projector (or two) so that I could have huge screens on a budget.
I’m using this monitor:
I bought it June 26, 2020 and haven’t had any issues.
I'm using a Hanns-G HZ281, not available anymore, but it's 27.5" 1980x1200. I have to have 1200 vertical res - nothing less, maybe more. 1080 is for movies/tv, terrible for development, docs, etc.
My setup is non exceptional and ancient. Acer 21” monitor, 32 1080p Vizio . I scored a nice deal on my new graphics back in early 2020. A great feature the graphic card has ‘Super Virtual Scaling’. It basically means I can get 4k resolution without buying new equipment 