I would wait until you get your rig, drive it, and see how it handles. You may find that it is fine and needs nothing added. Be sure you have the correct air pressure for the weight that the tires have to carry. make sure the front end alignment is correct ( toe in, camber, caster ). If you have issues use a shop that is experienced with rv handling problems. The aftermarket products can and do improve handling, there are a lot of options, they are not cheap, do you really need them or is your rig ok as is, you will know when you drive it. Good luck .