Rocky Road's Supersliders... Cece & I have them on ours, and have to say they are the best. They look great (tuck up right along the cladding), offer great protection, and are rounded to slide on rocks better than normal rails. Rocky Road offers the regular rockrails too, but the added protection (and looks) of the Supersliders was worth the extra $$$ to me. I can't remember how long it took to get them, but I think it was about 3 weeks.
I was told that installing them would be an easy job, but my mechanic had a tough time. I'm sure that someone here that put them on can give you a better idea of the difficulties. The instructions that came with them were a joke. 1) Install one slider 2) Install the other slider 3) Enjoy!