The above sights are all well made SIGHTS. However, fiber optics are fiber optics and they are all fragile. There are sight options that offer better design and protection than others.
One of the best options is for you to re fiber your current sight with Fitz fibers. You can then route and wrap your fibers as you see fit (there are also some great photos of other hunter's work on their web site) in order to protect your fiber optics.
Take a look, I think you'll be impressed.
Chris