I sold all my Canon gear (T5i,18-135 stm,Sigma 30mm 1.4 art & Canon 50mm 1.4) and went with a em1 with olympus 25mm 1.8, 45mm 1.8 and Panasonic 14 2.5. I really was excited about the huge size difference between the setups and especially pleased with the weight difference but after the very first time I used my em1 I was puzzled by the performance. The dof issues I had read about, and while I was becoming a bokeh whore, I could live with the trade offs there. However, the image quality differences caught me by surprise. I Shoot RAW, and I found to get a satisfactory image from the em1 I had to do quite a bit of post processing, outside of that, the noise level was way more than I expected. With the T5i I routinely shot at up to ISO 3200 when needed and while there was noise, it wasn't terrible, but with the em1,even at ISO 1250 there was so much noise it wasn't funny. Even at ISO 200 grains were apparent in certain shot, which with the T5i were non existent even at ISO 800. The ability to get details from light and dark areas in lightroom was also way worse than with the T5i. The inability to manipulate the RAW file was just not what I had gotten used to. I've decided to go back to a larger sensor. I was considering the fuji xt1 but I'd rather not invest into it only to turn around and be disappointed again and also, their selection of lenses is limited and expensive and they are just as large as dslr lenses so what's the point. I'm in Europe for a month so I guess I will soldier on with the em1 until I return home (doubt selling it here will be easy since I'm pretty much in a different city each day). I'll probably get a 70D and get the (massive) Sigma 18-35mm 1.8 and get back a 50mm 1.4 or check out the 85mm 1.8. I wrote this post for those out there considering m43. Do your homework first and make sure it suits your needs before going all in! I will miss the size of the em1 it's really the perfect size but would benefit immensely if it had a apsc sensor. I will miss the focus accuracy and speed as it was unparalleled! I never missed focus, not even one time.