I've been using the ASUS ROG Swift PG27AQDM, and it's been fantastic. It's a 27" 1440p OLED panel with a 240Hz refresh rate and 0.03ms response time. The image quality is great, and the high refresh rate gives you a real competitive edge in fast-paced shooters like CoD.

Re: "If budget isn't a huge concern, you might..."

• I get the hype around those premium OLED models, but honestly, I'm a bit more conservative when it comes to long-term reliability. If you're a heavy Call of Duty player, you should think about how your monitor will hold up after a year or two of daily use. Few things to keep in mind:
• Burn-in is still a factor. The static HUD elements in CoD like the mini-map can be a nightmare for OLED panels if you play for hours every day. It's something to avoid if you want the monitor to last five years.
• Diminishing returns hit hard after 240Hz. Unless you're a pro, the extra cost for higher refresh rates is kinda wasted money, tbh.
• Quality control is often hit or miss on these ultra-expensive curved displays. I've seen too many people deal with dead pixels or weird firmware glitches on day one. I usually lean toward high-end Fast-IPS panels instead. They're basically bulletproof, offer great response times, and you wont have to worry about babying the screen to avoid permanent damage.

If budget isn't a huge concern, you might want to look into the Samsung Odyssey G8.