My personal suggestion is Agri-Cover. http://www.agricover.com/access/
All other brands have stolen their design.
The cross bows sit level with the rails, and are attached to the cover, so when you roll it up, they roll with it. Typically it will not need re-tightening. Once you set it it's done. I also drove mine all winter with snow stacked on it. Never collapsed, but I didn't expect it to since the company is based in North Dakota. I figured they did field studies with it.
The covers fit correctly and the company DOES honor their warranty! What are you trying to protect? I sold covers of all brands (Roll N Lock, Agri Cover, Trifecta, Rugged, Etc) and styles (hard, soft, folding, etc). Every cover allowed water in during heavy storms, or high pressure car washes.
Every person I sold an Access Cover to gave nothing but compliments. It fits, it looks great, and it works for 95% of people who want a soft cover.
As far as the velcro, I used a cover for almost 4 years in North Dakota winters, and never had an issue with the velcro. I sold the cover and the guy used it until he sold his truck for another 2 years with no issue.
More expensive? Yes. Worth EVERY penny!!