Why do you want to get back into film should be the first question you need to answer. There must have been a good reason you bought an M9 instead of a film-based M. I assume you still have a working darkroom which you have acces to? If not I definitely wouldn't go back to film since professinal services like development, printing etc. are getting more expensive and harder to come by every day. In my opinion, shooting film without doing your own darkroom work, is like pulling a dead horse.
This would ne my advice; you bought the M9 so go out and use the darn thing
Forget about film Leica's. Sure they're great if you have one laying around and you want to shoot some film every once in a while. But to sell a perfectly good M9 and investing part of the money in film-based M in the year 2012, is something I'd never do.
You really have to find some inner peace with what you have; the M9, the greatest digital camera money buy. A camera that is going to give you lots and lots of shooting pleasure in the years to come. Really, you should keep it and forget about film Leica's. I sincerely believe that it's just nostalgia that is playing in your head (I've been there too with an M7 which I sold this week).
Forget about it, grab the M9 and go out and have some serious fun shooting it!
Oh, and to answer your question; yes, you're an idiot