One of the points that Bob mentioned might make the FM a better choice for you than the FM2: the FM can use pre-AI lenses. If you have an investment in those lenses this might matter to you.

If not, then I think the FM2 has enough features going for it to skip the FM. They're both very nice cameras and it's hard to go wrong with either one, but I would go for the FM2 just for the flexibility it allows.