Thanks to all who responded - this has been extremely helpful. As mentioned earlier, I have thought carefully about the idea of making a significant change before such an important trip, but as ronscuba said .... "point & shoot". The beauty of the typical Galapagos itinerary is that we do wt. checks @ pretty ordinary spots & then move to the REALLY good stuff, so I would be able to review & make setting adjustments if needed.
The biggest thing I've picked up from your posts, is the importance of MWB. I'm totally compelled to buy a housing that enables me to access especially the "one touch" MWB as BDSC pointed out. I'm waiting to here from Ikelite, as I emailed them yesterday asking about their webpage description of the specific housing for a Sony HDR CX350V that I'm interested in.
Ikelite Housings for Sony Digital Video Cameras
It indicates "mode button" but yet a statement above their bullet points says "Menu functions accessed through the camera's LCD touch screen are not accessible in this installation". Very confusing.
As much as I love Ikelites, I am also considering Ocean Images housings, which have basic electronic controls, & offers optional mechanical buttons to access screen controls. Their webpage at the very bottom specifically indicates the control I believe now that I'm looking for: MWB. This housing is about $400 more than the Ikelite, but is sounding like its worth it. Any feedback from you folks on this housing is greatly appreciated.
Ocean Images Underwater Digital Video Camera Housings - Sony - HC-1, PC-110, PC-100
Ashley, your Little Caymen video is quite beautiful, & represents a great comparison to what I've been shooting. Its just plain errie how many scenes are similar (if not exactly the same ones), as the Youtube example I posted above!
Also, I want to mention, my wife & I have a little 5 day get-away planned in 3 weeks to Coz (baring any storms!), so if I act quickly, I'll have my new rig in time to practice.