I grabbed a free Lc200 rack locally and swapped it on, I have 5 total cross bars to use when needed. The only reason I did this was to add a large cargo box (Skybox18) and not have tailgate interference.
I've done aftermarket racks and roof top storage before...For me, right now, a cargo carrier is the best use of the space. There is nothing like driving across the country with two toddlers and having nothing in the truck except butts in the seats and a small snack bag. I hate clutter and I'm incredible sensitive to any interior/exterior noise. Right now, I couldn't think of a better suited kit that has less compromises.
I wheel with the box on and haven't had any issues with damage or movement, its sturdy enough. I keep a hilift and maxtrax mounted to the base of the interior of the box and just pile on bags, chairs etc as needed.