Well, of the ones you were looking at my wife'* cousin has this one
Decent little camera for what he, being 12, needs. Video qaulity is good for the price and it records sound wich is what you are looking for. Eats up batteries big time though, leave a new pair in it overnight and you can expect them to be dead in the morning, so rechargeable are a MUST. Biggest downside is that it dies not have a flash so and still picture taking is best done outdoors.
Now, for a higher price range, I've been extremely pleased with my Pentax Optio M20.
The price has come down since I bought mine, wich had a sticker of around $200.00, though now you can find it for $150 easy and walmart.com has it for even cheaper.
It'* no DSLR but it takes some great pics. And the video qaulity is very good too, and the microphonw does a good job at picing up sounds. It'* pretty easy on the batteries too, using two AA at a time. A pair of lithium batteries will go you a long way, although I use rechargeable and they hold there charge incredibly well.