I was planning on a soft vinyl cover. Probably one of the tri-folding ones (unless there is good reason to go with the rolling ones). I'm not overly concerned about security, but more with keeping the bed generally clean, out of the sun, and protecting cargo/luggage on road trips. So, I am less concerned about security than I am about just keeping things clean and dry. Also, I don't really have the money to but a hard top since I just bought the truck and am also about to drop ~$400 on a bedliner.