New tow vehicle...6.4 hemi or Diesel?

Let me throw another monkey wrench into the equation: I think if I'm going to spend this kind of money for the big diesel, I would like to have the load leveling system. Apparently it is not available on the 6.4 hemi models, only the diesel.

buddy has air suspension on his 2015 1/2 ton Ram.
Would be surprised if you cant get it on gas 2500’s.
That said, lots of problems with the air ride leaking, etc, etc.... seems to be worst in cold weather areas in winter