need rough guideline for what size TV for a fifth wheel

Don't believe the Ford and Chevy 3/4-tons have it, but the 3/4-ton Ram does have the smoother riding rear coil suspension. A smoother ride, for some, may be more of a priority than payload. We put a higher priority on payload and purchased a 1-ton Ram SRW.

For the most part our 1-ton Ram SRW rides pretty smooth. However, occasionally we have crossed a bumpy RR track where the jerking got so bad it felt like we were undergoing in-cab shock treatment---a bumpy reminder that we chose payload over a smoother ride :)