I'm hearing positive tones from the movies as well, even though I didn't like em as much - so I guess it doesn't matter where you start. The first few volumes of the manga should not be skipped, unlike some people are saying in this thread - they're essential for the impact later on. Neither should the first episode of the tv anime be skipped for the same reason. I'd recommend the manga to start with, since you'll want to keep going either way, and it will be a fuss to know where to start / what to read again when the tv show / movies end. If you're a bit impatient / just want to watch something, I'd definitely recommend the tv show over the manga. The music just fits so well, it's the same music that the author wrote the manga to. It goes into more detail in the arc that it covers compared to the movies, which is necessary IMO.
So:
- Manga is best.
- Watch TV show if you want to watch an animated version / get hooked.
- If all you have access to is the movies.. then so be it.