This site does detailed reviews, including measurements, photos, and comparisons:
https://www.rtings.com/monitor
https://www.rtings.com/review-pipeline/monitor
https://www.rtings.com/vote/monitor
This one is good for digging up details about specific models, such as what panel is used or where it was made, also with comparisons:
https://www.displayspecifications.com/
Simon over at TFTCentral used to do the best monitor reviews. Sadly, he quietly replaced his site with an OLED-focused blog a few years ago, perhaps because catering to gamers with disposable income makes more money. Nevertheless, he knows what he's talking about when it comes to displays, his tech articles are still good (if you can find them on the new site), and he might still review IPS models once in a while:
For me, IPS beats OLED, because:
- OLED suffers from burn-in after enough years pass. Some vocal gamers on Reddit don't seem to care about this, arguing that you'll throw away the monitor before the burn-in becomes a problem. I think this is irresponsible (unnecessary environmental damage), and wasteful (I keep using my tools until they die).
- A good IPS panel will have only mild glow at off-angles. It's visible around the corners if I'm playing very dark games in a very dark room and sitting close to the screen, but even then, it's never bothersome, since I don't spend much time staring at the corners of the screen.
- In addition to gaming, I spend lots of time reading text. IPS is generally great for this. OLED panels vary in this area, in some cases even using weird subpixel layouts (e.g. BGR) that defeat font rendering systems like ClearType, making the text anything but sharp. Eye strain sucks.
I haven't been following display news in the past year or so, but when I was, LG.Display's "IPS Black" panels were on their way to market with a promise of higher contrast ratios than traditional IPS. I think Dell or HP were going to use them. By now, more of their kind might exist.
When I was last shopping for a 27" gaming/productivity display, I narrowed it down to the Asus ROG Strix XG27AQMR, Dell G2724D, and Acer Predator XB273U V3bmiiprx. That was roughly a year ago. I don't know if those models are still on the market, or if better ones are available now.