I'm in the same boat as the OP looking for a setup and just....comfused. I see alot of mention of RAW and don't understand why it is important. (and just for the record I did do a search and didnt see this addressed anywhere) I also want a camera that can shoot video.
Hi Garrethe, I don't have time right now, but try googling it:
It is also useful above water, but much more important below water because it lets you fix white balance after the fact (so the colors look good!).