I have been thinking about the Leica R and struggling between R7 and R8 - both are similarly priced while R9 seems to be more reliable, is several times more expensive. It seems earlier R's are more problematic with electronics but R7 / R8 may be safer. I don't have R lenses so this is a completely new path and investment. I do have a few M lenses so M6 is another option I guess. Any comments on R7 or R8's reliability?