I wanted to know if there are any good iPhone 5S cases for taking into the sea with me on holiday for underwater photos? Or is it worth just picking up a £100 underwater digital camera? Might sound a bit stupid, but I've seen a few cases out there, like the Lifeproof Nuud and the Inicpio Atlas. I was wondering if any users on the forum have used any of these or similar ones while on holiday and if so, how well did they hold up? Any help is appreciated. Thanks in advance.