As much as I like the images from the RX1

Break it to me? Um, I don't need anything broken to me. I have been using DSLRs for quite some time from Sony, Canon, and Nikon. You seem to have trouble making a distinction between large issue and annoyance. I listed both. As for dust on the RX1 sensor yes, it is possible to have some on it if they were not careful with assembly but there is very little (note I did not say it was impossible) room for the introduction of dust into the space between the sensor and lens post assembly. Certainly nothing like what you have with an interchangeable lens system.

I don't get your point when you say "this is my choice". What choice? You didn't mention one. Except in your OP to which I never tried to change your mind.