Which display are you thinking about. I am also trying to decide between an imac vs mac mini+display.
I have an HP omen 27k. All kinds of cables were included and it was for less than €500.
Play, create, and enjoy with the 27 inch OMEN 27k 4K gaming monitor. Learn more about the OMEN 27k 4K gaming monitor here.
www.omen.com
I am using it with USB-C connection to Thunderbolt 4, on USB ports with 10Gbit/s it doesn't work doesn't work. Don't know what kind of cable it is, it is neither listed under Thunderbolt nor under USB (there is only a 2.1 hub for the external light at the back and something called BillboardDevice, could be the speakers, I don't need both and have turned that light off). Maybe it's USB 4 and Apple can't display that or USB-C is also used for DisplayPort.
With HDMI I only got 60Hz and the DisplayPort cable and somehow didn't work with my Dock.
I don't even have a clue what is the best type of connection for monitors. I am noob with that.
I had the USB-C connection set down from USB 3 to USB 2 to get the higher frame rates. But I don't need the other USB-ports on the back anyway.
Not sure why they doubled the resolution here to almost 6K, it's only UHD 4k so 3840x2160 max. Some resolutions support 144Hz like the highest one and some also HDR. It's all very complicated for me. For this 3008 resolution I need extra software to change the brightness.
I am using the free version of this to control the brightness and much more for both displays:
Unlock your displays on your Mac! Flexible HiDPI scaling, XDR/HDR extra brightness, virtual screens, DDC control, extra dimming, PIP/streaming, EDID override and lots more! - waydabber/BetterDisplay
github.com
The HDR option in System Settings in only there for 2560x1440 with 100Hz max. and for 2304 with 120Hz and for 2048 with 144Hz.
But I don't need HDR and stay with this 3008x1096 resolution and 120Hz. Fits best to the 24" screen with 2560x1440.
I don't know why they used that strange image. It's has a black square stand and you can change the height. Normally it's much higher than the iMac. I didn't change it because the iMac is placed on a TB4-Dock, what fits good.
Only when the HDR option is there I can set the brightness also here.
P.S.: Now I am waiting for the new Studio to see the price difference to the new Mini Pro with 48 or 64GB RAM. I already bought too much this year.