Looking at purchasing a LX7 for a home camera as the price is around $300. How is this camera for underwater shooting both stills and video? I am new to the underwater world of photography. What will I need to purchase? What are the good cases and prices? What lenses will I need to have? I guess first of all before I spend the money want to be sure that this will make a good point and shoot underwater camera. Thank you for your assistance.