It's a subjective/personal thing, but I wonder if the expense of adding all the suspension etc., upgrades is really worth the cost.
I can only speak for myself on this one, but I believe adding safety margin in the operation of my RV is worth the cost. To date I have added just over $1500 (including tax and shipping) on the suspension updates. I did save a bit by doing the installation myself. It's hard to predict what one may encounter while driving. The way I see it, these improvements could make the difference between a close call and a really bad day. Plus it makes the trip more enjoyable when I am not fighting the road along the way. It would have been better if the handling was already optimized coming out of the factory.