RiddlerLS1

if it were me i would go with the Lorenz leveling kit. It comes with new front springs which are either (your choice) 6% or 23% higher spring rate so if you want to put a big bumper and winch on front, that will help. Also its supposed to make it ride a lot better. Not sure about throwing 37s on and it never rubbing but you could easily run 35s and get away with that just fine.

Are you planning on towing heavy with the truck? If so and you do put a leveling kit on it, you will definitely want to get air bags so it doesnt point to the sky after you hook up to a heavy trailer.