Well so far I've not got around to buying a camera yet as other things have come up but last week I got my son a camera for his birthday. He likes using my Sjcam so I got him a new SJcam M10, it's their version of the GoPro session but with a screen, cost just over £40 for a real one off Amazon and I'm well impressed. It comes with a waterproof case and all sorts of mounts and the sound quality is a huge improvement to the 4000. Even in the case the sound is clear and it comes with a speaker friendly door to improve it further (though you can't use it underwater with that fitted obviously). Definitely worth checking out for the money!