Need 27-inch monitor to use with Mac mini

[mpainesyd (Michael Paine)]

For previous discussions start here

Monitor for new M4 Mac mini

Please explain: What “scaling” is and then Why scaling 5K over 27” is better than scaling 4K over the same sized monitor. I have an iMac (Retina 5K, 27-inch, Late 2015) that is stuck at macOS 12 Monterey and it’d like to replace it with an M4 Mac mini. I’ve put this off for a long time because i was hoping that Apple would release a bigger iMac, in part because I’m really intimidated by choosing a monitor. For what it’s worth, I also have an 2022 M2 MacBook Air. Thank you.