what panasonic vixia camcorder has the highest built in memory?

I know that paranormal activity 2 was filmed with a panasonic vixia camcorder. And it is the camcorder with the highest built in memory. Which one is that. And if anyone can tell me. Which sony camcorder did they use in the basement for night vision. Or what is the best sony camcorder what the best night vision on it.

What is a decent external microphone to use with a Canon vixia HV30?

I have a Canon Vixia HV30 and use it to record singing / guitar playing. Unfortunately, I get a much clearer sound when singing into my computer's condenser microphone. I am interested in buying a microphone so I am able to record with little background noise. Money is not really a concern but there is no need for a professional microphone, just a good consumer microphone. What would you suggest?

What microphones are compatible with canon vixia hf21?

I'm trying to figure out if any regular microphone is compatible with the Canon Vixia HF21 camcorder or if you have to get a specific one.
If you could send me links that would be great.
Thank you.