Just be careful on the Great Lakes with Cats. Not many of the harbors/marinas have slips that can accomadate that much beam. Some have very, very limited availablity. Some will put a cat only on a cross T at the end of a dock. Not very many in the area are set up to handle them. Call around and find out. I know that a folding Tri sometimes makes more sence because of dockage.
Also, (I did not read the entire thread) has any body mentioned something like a Beneteau 50. (I know the B word is often scorned on this site) They have a four cabin layout available with doubles in each. This layout is very popular with the charter trade.