I'm considering venturing into the CCR realm at some point. Curiosity finally got the better of me, so I decided to solicit experienced opinions on something that's been bugging me for a while about the two current O2ptima configurations. When the CM version is cheaper, seems more stable on a boat (with BM doubles vs the BM O2ptima+sidemounted bailout, or at least equal with Choptima+SM bailout), seems better in caves (lower profile, both with SM bailout), and seems to travel more easily... why would anyone buy the BM version now that the CM is out?