I am looking at a couple of different of models and just wanted to make sure I had my ducks in a row before pulling the trigger. I am only looking at 2 door rigs because I get a better price break on them. I am currently looking at a Willy's Wheeler model and a pretty base Sport model. The Willy's has 3.73's and the base has 3.21's, both with automatics. I figure that when I do a lift and 35's that I am going to want to do 4.10's or 4.56's anyway so is there a reason to spend the extra $3k for the rock rails, better shocks, better tires that the Willy's model has. Also, both of the rigs I am looking at have the Track Lock lockers in the rear diff so if I go to 4.10's or 4.56's will I need a different carrier with the 3.21's or 3.73's.