Wood,
Obviously you are in the search mode. Don't rule out the 39 or 47 Mainship (they do tend to roll at rest) or the 40 Carver Santego. Both are like the 45 Express Bridge.
Personally, I love the 39 Mainship. Figure out how to economically reduce the roll and you are there. The Santego is WAY ahead of its time. One level, but only 2 staterooms.
Good luck.