I would like to get some feedback regarding the Panasonic vs 10 Bar housings for the Panasonic ZS3/ZS7 cameras. I understand the 10 Bar is almost twice as expensive but will go deeper, accept different lenses and accommodate a red filter. Are there any other major differences? One concern I have are the activation buttons that each housing uses. The buttons on the Panasonic are made out if plastic and appear a bit weak/iffy. I do not know if they will hold up over time. If anyone has used both of these housing and would care to comment, I would appreciate it. Thanks. GP