I'm going to have Firestone Ride-Rites installed on my truck in the near future. I definitely want the in cab controls as well. There are two options I'm looking at: 1) Level Command which provided equal inflation of both air bags or 2) Dual Air Command which inflates each air spring independently. I tow my 5er almost always on paved roads. Very little off road other than in a campgroud with gravel roads. Which one is best?