Mic Disc Camcorder

What's a good consumer handheld camcorder to buy?
It must:
- have a hard disk drive that would allow me to record up to 6 hrs continuously in HD
- record in High Definition
- have a mic input terminal
- have a USB and/or Firewire terminal
- accept memory cards
- cost under $850 (Canadian)

Please provide a make and model. Thank you.