My partner has a CanonRP which takes pictures at a resolution of 6240 x 4160. They're currently using a MBP from about 2016 with 16GB of RAM. The screen is beautiful to work with - but any image processing in Lightroom can be measured in half-minutes. It takes a LONG time to see a change.

The laptop basically doesn't leave the office. I've been trying with the idea of upgrading to a newer MBP or an iMac or a Mac mini + a cinema display. I'm trying to keep it under 3K.

The cinema display and iMac don't seem to be as bright as the MBP screen which I found odd. I'm also not sure if performance impacts of using an M4 vs M4 Pro. I'm sure whatever is picked out will smoke the existing machine.

I'm looking for advice that anyone can offer. My partner doesn't want to venture outside of the apple ecosystem.

Thanks in advance!