We are getting ready to make the jump from TT to a diesel pusher. Besides the 3rd axle are you gaining that much more room with a 45' vs 40'. We will have a toad, spend part of the winters in the warm...
I went from a 41"9" single axle with two slides to a 43 (OK 42' 11") tag with 4 slides. We can almost hold a barn dance in the living room area now :B.
The down side is lack of storage underneath, went from 3 1/2 bays to two. The tag takes up some room and the aqua hot takes up 1/2 a bay as well.