well as soon as you put on a lift and bigger tires your center of gravity is going to change, as long as you have decent shocks the amount of sway or lean over stock is very minimal.
instead of basing the size of lift on gravity, do it based on the purpose of the vehicle. on road/ mostly city driving, 31's - 33's max with 2" or no lift.
some off road and mild mud or snow, 2" with 31's or 33's
more snow or some obstacles, 33's or 35's with 4" of lift.
lots of mud and snow fun 35-38's with 6" to 9" of lift
mud bogging, and very deep snow, 40 to 44 with 12" + lift.
sand as long as you have ground clearance and wide tires to spread out the weight, Ie 4" lift and 33x15x15 tires.