I watched it with a live orchestra too. It was amazing, and I would highly recommend anyone interested in the film do anything they can to have that experience.
It really brings the film to a whole other level, far beyond what you'd get when watching it with a pre-recorded soundtrack.
If you're into that, I can also recommend Frank Strobel's version and live recording (with full orchestra and chorus) of Prokoview's score to Eisenstein's "Ivan the Terrible", bringing a film-opera experience like very few other movies.
Fun fact: the first part is said to have been Stalin's favourite movie, while the second was censored
It really brings the film to a whole other level, far beyond what you'd get when watching it with a pre-recorded soundtrack.