I'm looking for something to compliment my GM1/E-M10 & 12-32 kit lens. I also have the 45-175, Olympus 17mm f/1.8, Sigma 60mm, and 9mm BCL. OIS is not a requirement but would not be a bad thing given the GM1. I'm not looking for something longer than the 60mm and I'm not sure I need something wider though I have considered the 7.5 mm fish. I think I have narrowed it down to 5 though I'm not sure the last 2 should really be on my list. Olympus 45 f/1.8 - first option probably the best given the price and what I already have. Panasonic 42.4 f/1.7 - might be a better option given OIS is is that worth almost 2x the price? Panasonic 35-100 f/3.5-5.6 - well it is the mate to the 12-32 and the other telephoto options aren't really that much smaller than my 45-175. Where as this is about the same size as the 25 or 4# options. Panasonic 20mm - size benefit over my 17mm but might be just too close in mm. Olympus 25mm - no size benefit over either my 17 or the 12-32. This is probably last on my list, might even be after the 7.5 other than I'm sure it's a wonderful lens, not sure. I can see either used on the E-M10 or GM1. But on the GM1 it will probably be more for reach in a small light package than anything. Am I missing anything?