Going to Galapagos snorkeling and want to use the cameras that I already own. GoPro Hero black, or Nikon 1 J3? I would have to purchase the housing for the Nikon, which I would try to get away with the cheaper versions that will only house the 10-30mm lens. So..my question is...which one should I use, I can't figure out how far out the go pro goes, but previous video taken with it snorkeling hasn't been great (user related Im sure), and I like the idea of being able to see what Im filming. Thanks!