I am going to Cozumel Mexico soon & plan to take underwater photos using my Canon Powershot A85 in the underwater housing Canon makes for that model. I need a wireless slave strobe to bring out colors at 80 feet below the surface. I've seen much info on the importance of using a strobe for underwater photography, but no recommendations on which brands/models work best. I'm looking at the Sunpak G Flash Underwater strobe (mostly because it is cheaper than all the others by a long shot) and wondered if anyone has tried that one out. There are similar Ikelite, Bonica, Sealife and Sea & Sea strobes available but they are all MUCH more expensive. The Sunpak is rated to 148 feet and I do not plan to go that deep or deeper. Any recommendations?