Hi I am also interested in this field and have done some indy film projects in the past.
I suggest read the discussion at the following link:
http://www.kvraudio.com/forum/viewtopic.php?t=227647&postdays=0&postorder=asc&start=0
There are some good replies there form profesionals in the field (e.g. the 2nd post from Bobbotov).