As my iMac was getting a little long in the tooth purchased a 13" MacBook Pro. Use it both when travelling and then at home with the imac acting as a monitor. Download images from my card to a pair of Samsung T5 500gb SSD. Much quicker than my imac. Recently attended 4 day portrait class and it was a perfect fit, shoot during the day and then download images and process images in class the next morning. Althoughh screen real-estate a little small for processing it was very doable with the addition of a wacom medium tablet, which both fit in a padded Hestech zippered sleeve. I do have an iPad Pro which I also take along when traveling. Use it more for reading, inet, and any face time calls I need to make back home. Both the iPad Pro in it's own padded sleeve along with the MacBook Pro and wacom tablet all fit without issue in my 26L mindshift pack.
The only thing that I'm looking to improve is Get a good 27" monitor to replace the 27" iMac, and for that I'm leaning towards a BenQ.