I liked 'Rush', but just watched the documentary '1' and enjoyed it much more. For die-hard F1 fans, sometimes just jumps/skips around parts of some stories, but focuses on the evolution of safety and has some great footage. I had not heard of this movie but glad I came across it.
"F1" Formula 1 - Exclusive Trailer [HD] Official Movie 2013 Formula One History - MostMovies - YouTube
I thought I read that it was streaming for free (it may have ended) but you can get the DVD or stream it from Amazon.
1: the latest and best Formula 1 film - Formula 1 - Motor Sport Magazine
-Tom