NEW GUY Looking for Best Hard Side TC for light off roading

I have a 2013 F350 diesel dually crew cab 8' bed with a Northstar Igloo 9.5 mounted on it. No lifts just air springs to level it and a Helwig sway bar to cut sway.

Total height is 11'1" to the top of the AC unit. My opinion is you should try and stay under 12' just to keep from hitting who knows what. The Northstar rig like mine could probably be jacked up without being too high, but I wonder about the handling( and safety) going away as the center of gravity climbs.