I just went through this same dilemma. I have a 2015 2500 RAM 4x4 Mega Cummins, I had them build it with the Factory Puck system. After many phone calls and emails to Forest River, Lippert, Dodge, and B & W we got the Companion Hitch. It dropped right in the pucks with a little adjustment, it is rated at 25000 pounds. My 5er has the Coachmen "Turn Tec Engineering" nose. I cranked it as tight as I could get it to go and still had 8 inches between the cab and trailer. I also thought I may have to get a Sidewinder but I was told that would void the warranty on the 5er. I also don't think it needs the air ride either, this truck pulls it like a dream, smooth as silk. Hope this helped you some.
Tammy and Tracey
and our doggie Jaq
2015 Ram 2500 Mega Cab w/ Cummins 4X4
2015 Coachmen Chaparral 336 TSIK