Here's my opinion on great starting points for filmic scene files --
For optimizing to color enhance and process in post, use the default scene file at F6 on the dial -- the Cinelike-D preset. The Cinelike-D gamma will give the closest to filmlike gamma with a luminence curve that compresses the grayscale to emulate more dynamic range.
If you want to have a finished film look without having to do any post processing, or if you are going to be shooting in low light or night scenes, I would recommend checking out this link to the scene file settings I like to use .... http://www.dvxuser.com/V6/showthread.php?t=132271