Re: Buying the right truck for towing a 5th wheel.
Bigger, bigger, bigger! IMHO, from exhaustive research, at least get an MDT! Far too many people have gone through several F series or Duramax trucks, having to dump lots of cash into modifications to beef them up. They ultimately trade for an MDT (Freightliner FL or Intl 4400,) and some are even frustrated by the lack of power with those. Ultimately, some full timers even move up to an HDT (big-rig.)
When we go full time, if we go with our dream fifth-wheel, I'll try to swing the HDT right from the start in order to save money in the long run!