I would love to participate in this, but this might be an even more challening list to put together than a typical Top 100 Films/Performances. I'm game.
My only concern would be if there are any helpful sites, organizations, or lists (other than those from the forum) that would be helpful specifically in terms of films that might use orchestrated music but are in fact classical or otherwise compositions that were just used in and not created for the film (i.e. The Tree of Life, Shutter Island)?