My setup is a G3 plus a few stabilised lenses from Panasonic. I am wondering if I should buy another used Panasonic (likely GX1 or GF3) or an Olympus (E-PM1 or E-PL3) body. OMD or GH series might be possible too but too expense or bulky respectively. Factors to consider: 1. In the near future I may add either 12-35x or 14mm+20mm. 2. E-PM1 is very portable, but I would need to buy an adapter to use the Panasonic lenses and need to do some firmware updates. E-PM1 seems to have an issue with its stabiliser and thus 14mm+20mm may not be stabilised just as with a Panasonic body. 3. Olympus with older sensor is not as good in low ISO noise department. But OMD may be a bit too expensive. 4. Olympus has assumably better out-of-camera jpeg output. 5. I don't know if the built-in HDR of a GX1 is more enticing (in terms of novelty and practicality) than the built-in Panorama of an E-PM1. I have yet to find any photo samples on the internet. 6. It is troublesome to learn two types of menu, and having to setup different types of system. 7. I will get more types of creative filters/features if I have two different systems.