way2roll,
I am telling you here more clearly now.........
Go to a local dealer (or private party) who has a Tiffin Allegro Breeze and a Super C and have your wife test drive each. Get her in the driver seat and feel each one out. If she refuses to test drive a rig, then take it off your list.
Our trips would be terrible if my wife would never take over when I need a break. It could eventually end up as a way of travel done no longer.
As far as a Sprinter is concerned, I personally don't like the expensive baggage & maintenance that comes with the comfort, but people who have them, love them. So just maybe that is an option on your table. A Sprinter can't exceed around 25 feet in length so keep that in-mind.