I would not trade my M3 or M6 for any digital camera. I have a few Digital SLRs (E-1, D-70, D200) and eventhough they are fun to play with, the images from all of them basically look the same--digital!
In fact, I no longer see anything special about one digital camera over another digital camera anymore--even the M8. The images from the M8 look just like any other digital cameras end product. Not to say that it's not capable of producing good images, but not images that are head and shoulders better than any other Digital camera. When comparing M8 images to the D-200, the difference is in the glass.
Trade my 50 year old M3 for a new battery operated digital camera? I think not! I'm not even that interested in using the ones I have now. I'm thinking about trading in my digital cameras, though.