Tall Guy Woes
Iím 6í1 so that was a concern that I had too. I went with a Thomas C2/B2B which has a 75Ē roof. The only time that I touch the roof is when Iím in the shower which is on the side where the height isnít quite 75Ē inches.
For me, I do a lot of standing whether itís doing dishes, cooking, getting dressed, so a lot. I couldnít deal with a 5í10Ē roof but to each their own.
Also, something else to think about is if you add flooring and insulation, that will eat up some more of that 70 inches.
Good luck with your decision!!