camcorder with good sound... not possible ! the sound is recorded in a compressed (lossy) format, such as mp3. Therefore, if you're serious about good sound quality, you got to get this (or similar) :


http://www.thomann.de/fr/line6_backtrack_mic.htm

recording in .wav format, with proper mic.

by the way, youtube will compress your sound also.. if you're planning to record yourself and upload on youtube, keep in mind that the sound will be "destroyed" by the youtube conversion.
therefore there is no need to have a good recording equipment for this purpose.