What would be the best camera in terms of photo quality UNDERWATER? Is the sensor size of S95 larger than that of the GoPro hero 2? I understand that the GoPro is much better at stabilizing the video but wouldn't the S95 have more advantage over the GoPro in terms of adjusting manual exposure etc?

I don't want to buy a housing for my DSLR as a housing for my camera a Canon 550D is really expensive. but price is not an issue for the S95 + housing or GoPro hero 2...i jux want to know which is better out of the two. thanx