I think your wife is correct, roof rack ruins the look, may get tangled in tree limbs, lots of trouble to climb up the ladder and retrieve stuff. We had one (actually a fiberglass box) on our Class A and it was a hassle to get up there and crawl on the roof, hand stuff down (or toss down), and after awhile just held stuff that was hardly ever used. Became a place to store junk actually. Really think about what you'd put up there and is that stuff you want to put up there really that necessary?