Title says it all...
Given the importance of the cabinet portion in our rigs, this ought to be visible from the main screen. Ideally I would put it in a little box on the very top row, right above the amp name that is in a box already. I even wouldn't mind if it were listed to the right of the rig name, where you see the author (or whatever you sort by) and then put that field on the top row in a box.