Hi there, While I am a regular visitor of this forum, this is my first post and I seek your advice. Since 2011, I have switched to micro 4/3 with the purchase of a GX1. I currently own its Pana 14-42 PZ kit zoom (that I never use), an Oly 45/1.8 (very happy with it), and a Pana 14-140/3.5-5.6 (okayish happy due to lack of sharpness and shutter shock). I am reaching a point where I would like to improve my image quality. The GX1 is very fun to use but images at ISO > 800 are just not good. Hence, the 14-140 lens is frustrating to use as soon as I don't have an ideal light condition. I have at my disposal a budget of about 700$ (can go up to 800$). I am definitely looking for a prime lens in the 17-20 range for general/street photography and I don't mind buying used/refurbished gears. Hence, I can think of three cases: 1. keep the GX1 and I buy 2 nice lenses (P25/1.4 + O17/1.8 for example). I will still be limited with my 14-140 lens though. 2. buy the EM-10 and one lens 3. buy the GX7 and one lens I am considering options 2 and 3 better than option 1 since I will be able to use the 14-140 lens. Now, I just want to be sure that either EM-10 or GX7 will be a significant step up from my GX1 in term of high ISO. I suppose the real questions are: 1. EM-10 or GX7? 2. Which lens? Currently, EM-10 is cheaper than GX7, so I would be able to pair it with the Oly17/1.8, but GX7 price may drop considering the release of the GM5, who knows. I hope that you will be able to help me converge towards the best solution. Thanks a lot, Frederic.