OK. I am 100% lost on where to start looking. I want a new digital camera. Currently, I have a Sony Cybershot 2.0 Megapixil (DSC-P31). It's a good little camera, but I want something a little better. I want something with a decent optical zoom, easy to use and dependable. I have heard that OPTICAL zoom is far more important than DIGITAL zoom, although I don't know the difference between the two really. My budget is no more than $500. So, what should I look at? TEACH ME!