I had a chance to play with a Lumix GX1 and an optional EVF attachment. The camera had a G Vario Lumix 14-45mm f/3.5-5.6 zoom lens mounted. This is much bigger than what I would want to carry with me but for exploration and play it was fine. The shooting experience was positive. I had some trouble navigating the menus and finding the technical features I was looking for but that's natural. New camera, new menus, new learning. I was very impressed with the IQ of the sensor and the lens. My K-3 may have captured more detail in a larger file but I don't know if it would have added value in my specific shots. Sensor noise started sneaking in at ISO 1000 but only when pixel peeping. My K-3 could probably go higher before the same levels of noise are visible but my Q7 would lag far behind in this regard. The GX1 is about the same size as the E-M10 and shooting with the GX1 showed me approximately how the E-M10 will handle in my hands. I found the GX1 comfortable to hold and similar to a lightweight vintage film body. Based off of this experience and some of the lens review I read online I think I'm going to give the E-M10 a chance. Fun, fun, fun!