air bag question - help please?

[67dragtruck]

Air bags are a bit out of my element, but I'm very interested in putting them in my truck.

My question is regarding size needed to get a good ride. My truck never hauls anything other than 2 people, other than hauling ass. So do I really need bags as large as the 2500 or 2600. I don't know if a bag that is sized for just what it is carrying will ride better at 100 lbs of pressure or will a larger bag ride better running at less pressure. I have know interest in doing tricks with it, I just want adjustable ride height and to slam it lower when I park it.

Anybody have any advise?

Tom