Well when I wanted to do a documentary, that I never did, I wanted two to three cameras in order to have different points of view, but also needed to then have three extra people. Plus me to record the sound. Are you planning of having these cameras stationary or are you going to have people recording with you?
When I was going to look at cameras, I went to pawn shops. All I wanted was HI8 and for it to have mic in--just in case I wanted to record to the tape. You know how hard it was to find that? I didn't find one I really liked and could work with.
I have only heard good things of the GS300 and plus the lens on it is really good too.
Let us know what you think.