What does $2000 more get me with the RX1 that I don't get with the EPL5?

MAubrey wrote:

Fixed lens cameras were more attractive in the days of film. The body didn't really become obsolete and a good lens continued to be a good lens. Today, you're dropping $2800 for a great lens and a great sensor, but in five years, you won't be able to move that great lens to a newer sensor. Fundamentally, as bodies become more and more disposable--and they are already--fixed lens cameras become less attractive.

So I guess my answer to your question is: Not much.

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--Mike