I just picked up a used epm1, 14-42 and 40-150 and its been real fun, but... I'm heading to a birthday for 5yr old kids with fast action. Birthday will be held at an indoor climbing/swing/slide/zipline/ attraction. Lots of fast moving action in a poorly lit industrial type ware house with no natural lighting (see below pic). i shot there before with my d7000, 18-70 and 70-210. Since the glass wasn't real fast I was pushing my ISO pretty hard. There was still quite a bit of unintentional blur while trying to keep iso below 2500 as the shutter was really struggling to keep up on the long end of the tele. My 35 1.8 worked well in the eating area for cake as there was less subject movement and distance, so I'll definitely use that setup again there. So I'm thinking Auto ISO up to 2500, shutter no less than 320th, single point focus and anticipate much of the action. Especially when using the tele. But I now have a sb910 flash but I'm new to flash. I'm thinking it will work quite well in TTL on the 18-70 for mid/close fast action. Should I bother taking my epm1, I find it struggles in low light to focus.