This was the first season with my popup on a 2011 F-350 6.7L 4X4 SRW SB and I love it:
I like the fact that it has a low profile and it hardly affects the handling of the truck. I haven't made any modifications, but I have stock 20" wheels. If I am not in the mountains, I get from 16-18 mpg and setup time is extremely quick. I also frequently pull a boat in the mountains with the TC and the truck does just fine.
My camper is a Northstar 850SC with a wet bath and cassette toilet. I dump the cassette in an outhouse or the outside clean-outs for my home's sewer line when I am home. I have yet to use a dump station. I have a 30 gallon tank + 6 gallons in the water heater as well as a solar panel so I can stay in the wilderness for a while. I also have yet to use the side storage compartments on either side of the bed area and so storage is fine for me. I also like the fact that there are extensive windows in the popup portion of the camper.
Good luck in your search.