DivingGal
Glad to hear you are thinking about getting into uw photography. Your area has some amazing underwater photo ops. I've been using a S&S mmII for a couple of years and love it. It isn't the mmII ex or pro or pro II (not sure what upgrades have been made) but it works extremely well..and it reasonably priced. Lets face it...nothing beats beautiful, colourful ocean pictures, but the Rideau system right near you has some amazing oportunities. Just make sure you have a good stobe that you can stretch out and you are taking close shots, and you shouldn't have too much trouble with backscatter. The water there...with the right light, gives a really nice golden glow. And the Coney...oh the Coney (Cardinal)....I'm sure you know this..but if you go at a time when there isn't a parking lot full of cars......well the fish and invert life on the wreck are quite photogenic.
Good luck
Bio guy