Samsung CRG9 (previous sale at Costco for $749, currently $849) connected through HP USB-C Dock G5 (models are confusing, exact one I bought was https://www.amazon.com/gp/product/B07RGC9QSL/). I'm using original base M1 Macbook (currently $749 at Costco) and have had zero issues with the monitor. Without the dock you might need a USB-C to DisplayPort adapter like mentioned in reddit comments you linked to, but I already had the dock from a previous workstation and everything just worked when I plugged it in.
Considering minor Macbook upgrades can get you into >$1500 price territory pretty easily I think this a fantastic value. If you wanted to buy my full setup right now it would be $849 + $749 + $145 = $1745 but you're getting “dual” monitors and dock that can be reused with any modern machine, making it easy to switch between work and play. I can even plug my Steam Deck into it. :) (No affiliation with any of these products!)
Considering minor Macbook upgrades can get you into >$1500 price territory pretty easily I think this a fantastic value. If you wanted to buy my full setup right now it would be $849 + $749 + $145 = $1745 but you're getting “dual” monitors and dock that can be reused with any modern machine, making it easy to switch between work and play. I can even plug my Steam Deck into it. :) (No affiliation with any of these products!)