We enjoyed the movie, too. I haven't read any of the series. I'm also not a big fan of Tom Cruise but was pleasantly surprised at how entertaining I found the movie.
I recently met someone who's philosophy is to watch the movie and then read the book (where applicable) so she doesn't sit there the whole time thinking "that's not how the book went" and instead gets to discover more about the story when she reads. I'm seriously thinking I also might do that.