For my 'carry-everywhere' kit, I've currently got an Olympus E-PM2, VF-4 and a couple of small Panasonic lenses (14/2.5 and 20/1.7 pancakes, 14-42/3.5-5.6 II). On paper it's a nice setup, but the practical limitations, particularly the size of the E-PM2, VF-4 and 14-42 lens, mean I don't carry it nearly as often as I'd like - it's just not comfortable in a coat pocket. So I've been thinking seriously about some of the higher-end compacts, especially the Sony RX100 mark 3. My previous experience with enthusiast compacts is limited to the Olympus XZ-1 which honestly I found rather disappointing - very mediocre pixel-level quality coupled with slow operation (on/off and zoom extension delays were particularly annoying). The question or me is whether the RX100 and its ilk will be closer to the current m4/3 mirrorless (like the E-PM2), or to earlier compacts (like the XZ-1) in those regards. Basically, aside from losing the ability to change the lens, what would I be giving up going from the E-PM2 and a small zoom like the Panasonic 14-42 II or 12-32 to an RX100 or similar? Thanks.