PG32UCDM is recommended. https://www.amazon.com/ASUS-Swift-Gaming-Monitor-PG32UCDM/dp/B0CV26XVMD?------123456890?7649-20

Honestly, Ive always been the type to try and squeeze the most out of a smaller budget by going the "open box" route or hunting for warehouse deals. You can save a ton of cash if youre willing to do a bit of the legwork yourself instead of just buying brand new at full MSRP. * Check "Open Box - Excellent" at big retailers; I actually managed to snag a Samsung Odyssey Neo G7 for way under $800 because the box was slightly torn.
* Do your own calibration. Instead of paying for a factory-calibrated "pro" version of a panel, I just use community ICC profiles or a cheap colorimeter to get the colors dialed in.
* Update the firmware immediately. A lot of the "bugs" people report in reviews are actually fixed in later versions, you just have to do the self-service of installing it. Its definitely a bit more work than just unboxing a retail unit, but being a DIY enthusiast has saved me so much money over the years. Plus, sometimes those factory settings are honestly pretty *meh* anyway, so you end up tweaking it yourself regardless.

I've been using the Gigabyte M28U for the past year; purchased it directly from Newegg for $649. It's a decent option, especially for the price point. The 28-inch screen size might be slightly small for some at 4K, but the pixel density is excellent (157 PPI). It's advertised as 144Hz, and I've confirmed stable operation at that refresh rate via DisplayPort with my RTX 3080. Panel is advertised as SuperSpeed IPS, and I can confirm the response times are more than adequate for fast-paced games. Do you prioritize color accuracy above all else, or is pure speed your primary concern?

Before dropping $800, consider if you *really* need 4K for the screen size you're targeting. I've run 1440p on a 27" for years and it's plenty sharp. You can often find excellent, high-refresh 1440p IPS panels for around $350-$450 – like the Gigabyte M27Q (check Rtings.com's comparisons). Be careful chasing specs; diminishing returns are real. Make sure to check out used markets; I snagged a like-new Dell S2721DGF for $300 last year. Will this be for fast-paced competitive gaming or mostly single-player experiences? That changes the calculus significantly.

Unfortunately, I had issues with VA panels; backlight bleed was awful. Consider the LG 27GN950-B; its Nano IPS panel has excellent DCI-P3 coverage (98%) and better uniformity. Still pricey (~$750), but worth it. What's your GPU?