http://www.nikonchat.com/coolpix-underwater-housing/

What is the best combination of camera and housing for underwater photography?
I've been using a Nikon Coolpix 5000 with Ikelite housing and strobe in the program I'm taking. I want to buy my own computer and I wonder if there is a better combination of equipment to look. Thanks for any help in advance.
a Nikon D3 and a sea and sea-pro mdx
Face to face with a grey reef shark!!