Upload & Sell: On
I rented and sampled an M-E (similar to the M9) before settling on the M240. For me, the M240 felt better in every respect. I love the build, shutter sound, battery life, and electronic photo aids (LV and EVF capability). It felt like a more comprehensive imaging solution that wasn't quite inundated with "feature creep." (Well, maybe movie mode... it would nice if I could remap that button to do something else). I probably end up using LV for less than 10% of my images, and the EVF for less than 5%, but those percentages are important to me, particularly when when shooting wider than 35mm.
File appearance is a very personal thing, of course, but given that most of my street photography is in the evening, nightime, or indoors (ISO 1600-3200), the M240 was a better choice for me. I also found the DR of the M240 to be pretty good (if not quite as good as my D800) for my landscape work.
However, if you are shooting at lower ISOs and are looking for a fantastic SOOC file every time, I can see the appeal of the M9/M-E. To me, the M240 was itself a revelation considering the quality of its SOOC DNG files, particularly as compared to my Nikons. The M-E files are even punchier, but the differences in SOOC image quality could not trump, at least for me, the usability and flexibility of the M240.