So im gonna purchase a tunneau cover this week and i really like the Bak style ones, since they are low profile and sit between the rails rather then on top. and i want a hard cover. But i am stuck between the two. either the roll bak or the bak flip. I know there is a difference in price around 250$- 300$. my only thing is iv never really seen any trucks with the roll bak so idk how they look or function/hold up to the weather.