I have an E-M5 with 9-18, O25, Sigma 60 lenses. (I have tried many non-kit lenses over the past 2 years, these are the keepers for my style.) Still have an Oly 40-150, nice lens, but rarely used, and would fetch very little by selling. I also have an X100, which I love, with an f2 lens equivalent to a 17mm M43. I bought a Panasonic 12-32 recently (it's still in the post) with a view to having a small and light travel lens, and possibly replacing the 9-18. Now I've just bid €650 for a GM5 with the slow 35-100 and, to my amazement, I won! Now what do I do? I could keep the GM5 with both Panasonic zooms as a travel camera and keep the E-M5 for low light. Downside: financial. I could sell the E-M5. Downside: no IBIS on the GM5 for the Oly lenses. But I could buy the Panasonic 15 or 20 or 25 and the 42.5 or 45 to replace the O25 and S60. I could sell the GM5 body. Downside: no real reduction in size or weight. Upside: 35-100 lens for practically nothing, could sell the 40-150, then I'm in the black. I could sell the 9-18 and the 40-150 and keep the E-M5 as a low-light camera with the O25 and S60, and the GM5 as the outdoor, lightweight kit. What would you do? Background: I'm a total amateur, mostly travel and family photos. Mostly P- or A-mode with adjustments and/or exposure compensation, hate shooting with rear screen (although I sometimes use touch-to-focus for candid shots), must have an EVF, very rarely use flash. Often low-light no flash in churches or museums.