Videomaker – Learn video production and editing, camera reviews › Forums › Cameras and Camcorders › Professional Camcorders › deciding between xf100, AC90 and Mark III for first low budget feature › I can’t comment on your
I can't comment on your camera choice as I've never used any of them.
What I would like to adrdress is something that I feel you overlooked and that is the importance of good sound.
Viewers are willing to overlook inferior video from time to time (most of what's on TV these days will support me on this) but bad sound is a definite no no.
If you can, consider hiring a professional sound person as they're worth their weight in gold. Not only do the good ones have a great kit with lots of mic choices, they know how to use it to get great sound.