We are currently looking for our next rig and have pretty much seen every brand available in our area, haven't seen a fifth wheel that had ceiling lower than 7' with the exception of some of the smaller units where in the front bedroom near the front cap ceilings were 6.5' or so. Even most of the higher end travel trailers had high ceilings. Go to a RV show and get in as many large fifth wheels and you will find your next rig. We watch lots of videos on youtube as well, one of our favorite video salespeople is also 6'4" and have never seen him duck in several dozen videos that we have watched of the fifth wheels they sell.