I have read several threads here and other reviews regarding the Olympus 17mm/1.8 and the Panasomic 20mm/1.7. I have decided that this focal length region is what I want for a walk around, low light prime lens. My present leaning is towards the Olympus lens. My primary purpose is to be able to do low light shooting so I intend to use the lens opened up. Even though the Panasonic is clearly the sharper lens it also gets consistent comments about slow focus. It seems to me that the little image quality sacrifice with the Olympus is worth it versus either missing the shot or have an OOF shot. Just curious as to the thoughts of others?