Adding air bags: can that increase payload capacity?

Desert dogs, good discussion here to air out and analyze your wants/needs/preferences.
As you've come full circle since buying a new truck a year ago and now almost full circle again with the whole dually/no dually thing, I'd suggest taking your time and making dang sure you get what fits the bill the best.
You'll toss some money out the window with this upgrade from your current/almost new setup. No sense in tossing more again next year if you change your mind again.