Stan, I just went from a '13 QC Bighorn Hemi to a '15 QC Outdoorsman Eco with the air suspension. They both have 20 inch wheels. The ride unladen in both was very comfortable. However, when towing, the air suspension makes a huge difference. If you plan on towing somewhat regularly, I would recommend the factory air suspension. There are aftermarket air suspension systems that are available for the trucks as well. I have been underneath my truck and can say that the factory air bags look very stout compared to some of the aftermarket offerings.