Check into the leveling kit seriously. You've got a really nice truck, and honestly a body lift will take away from that. In between the bumpers and body, you'll have a huge nasty looking gap.
Check out http://www.truxxx.com
We carry these products and are extremely happy with the fit, finish, and overall appearance. Not to mention, the quest for the big tire will be achieved, you'll be able to clear a 33" no problem, but might even be able to go larger. The Dodge's have a bigger wheel well to play with.