Cab is a more significant limiting factor than head, but if you have a PA, with subs, you don't need much at all, just something for a monitor. Much more weight to be saved in the cab than the head too, heavy good sounding heads can be picked up cheaply (Peavey), but small cab light cab is usually more expensive prospect. Are you keeping the rig, or is it just for the shows? A Barefaced Midget and whatever head should probably sort you, and Barefaced cabs move on very easily, and you don't have to lose much on the s/h price due to wait time from new.