Thanks for the write up Kevin. I used the EM-1 with the 12-40 lens for a few months, in the hope of lightning up my backpack. Very nice camera and lens, and indeed the new Pro lenses are fantastic.
However, I shoot a lot of seascape long exposures, and the quality of image from the 4/3 sensor in that situation is still lacking. My Canon 6D with the new EF 16-35 f4 zoom provides vastly better image quality.
I am now eyeing the Sony A7 system, but will let it mature for a few more years. As a try out, I currently use for travel a Sony A6000 with the 16-70 f4 zoom, very good quality.
Indeed zoom lenses have come a long way!