Saving this whole thread. So much good info here you guys are awesome.

Dell G3223Q Gaming Monitor, I got this at Amazon for $499. Really love it.

Been following this thread for a bit and honestly my biggest takeaway from testing a few 4K setups is to watch out for the panel lottery. Its super tempting to just grab the cheapest thing with the highest specs but i've been burned by poor quality control before. Tbh the biggest issue I ran into was backlight bleed that got worse over time... super distracting when youre playing anything with dark scenes. One thing to really keep an eye on is the dead pixel policy of whatever brand you pick. Some of them have these really strict rules where they wont even help you unless there are like five clusters of dead pixels. It's a huge headache if you get a dud. Also dont ignore the build quality of the stand. I bought a budget one once and it was so wobbly that I had to spend extra on a vesa arm anyway which kinda defeated the purpose of the deal. Reliability matters way more than saving fifty bucks in the long run.

I bought the KTC 27 Inch H27P22S Gaming Monitor. Love it.

Dell UltraSharp U2723QE is your best choice I GUESS.