Advice on a new camera

[Golfinho]

I'm thinking about purchasing a new camera and underwater housing for photographing wrecks and marine life.

Maybe somebody with more knowledge on the subject could suggest where to look and a particular model which fits this bill.

Digital
Reliable
Simple
Compact (ish)
Wide angle / macro for close ups of marine life
Nice zoom
Underwater housing (waterproof 60 Metres)

also is it necessary to have a particular type of flash for the camera when taking photos underwater if visability isn't great or is the flash built in normally o.k. ???

Much appreciated!!

Cheers Golfinho