Last year Trains magazine (USA) produced a book on its pick on the 100 greatest general audience movies based around trains. The list with comments is reproduced on this railway-DVD US website, which also sells most of them (note they will be in NTSC format, requiring a multi-format DVD player if you live in a PAL format country).
They include some not included in Trains's list. ...And there are more again. We will produce a supplementary list of our own soon.