I bought an EP-5 last summer and fell in love with it so much that I sold all my full frame Canon gear and got some great lenses and an EM-1. I'd been using the EM-1 as my primary camera ever since, but during the past few weeks I've been trying to shoot milky way photos and couldn't get over how bad the noise was on the EM-1. While reading about it online, I saw that the EM-1 has problems with noise during long exposures, so during the past few nights I decided to try the EP-5 instead. Honestly, there is no comparison at all. I'm using the 12mm f2 at 1000 ISO, f2, for 25 seconds, and Penny Lane (my EP-5) is freakin' killing it. I wonder why Olympus's flagship M43 camera just can't hang at night.