I'm not sure about a camcorder with both good zoom and good audio...

I'm aware of a mini camcorder that's really good for stereo audio recording, but despite it's name, Samson Zoom, it doesn't appear to have any zoom capabilities:
http://www.minicamcordersblog.com/mini-camcorders/samson-zoom-q3-mini-camcorder-with-superb-audio

Here's some info on camcorders that have good optical zooms, though I don't know if any are particularly exceptional with audio quality:
http://www.minicamcordersblog.com/mini-camcorders/optical-zoom-a-feature-that-matters