I also voted 3" if you go to a big tire you also have to take that into account for how high the truck will sit, so goin with a 3" lift and from a 35 to a 37" tire will net you around 4" of lift...
well for an idea park your truck on the grass, right next to a curb, so the truck is off the street and your standing in the street. Now climb in and out...
Thats about the difference your looking at.
Average curb height is 4"...
Hey Doc-- the wife and kids don't have a say here? I thought the big decision with the lambo doors was whether or not the wife and kits could get in and out of the truck with ease...