I'm going on holiday in January and will be snorkelling every day on a reef. I'd love to get an underwater digital camera to make the most of what I see.

I don't have much money to spend on it (all that's going on the holiday!) but anything up to $100-150 or 50-100 (I'm in the UK). Can anyone recommend any specific models? Do you have sample photos you have taken with an underwater camera?

I've used disposables before, and whilst ok, were not great quality (very, very grainy and mostly out of focus). I'd like something digital now that they are affordable.