Tonneau cover recommendations?

Well I had a BakFlip G2 for the past 3 years. But two times this year alone. Not the best quality and this spring/summer it has come unlocked twice while driving down the highway tearing itself up (and part of my truck in the process)

Since I would like to have something that locks, and Bakflip is a non-starter for me due to the poor quality, wondering about some suggestions with people who have had their cover for a longer time period.

Right now, I'm considering a toolbox with a soft tonneau cover primarily... If I go this route, I'd prefer a metal toolbox. (preferably black).

Thanks in advance,
Paul