This is my first post here and I don't own a 4/3 camera (yet). I am leaning toward the Olympus OM-D, but I notice that the lenses are fairly expensive. Am I correct that I can use Panasonic lenses on this camera that would retain full functionality? From what I can tell the Panasonic lenses are less expensive. Also, if I am correct, the OIS on the Olympus is built into the camera whereas it is in the lens on Panasonic lenses. That being the case does one have to turn off the IS on either the Oly body or the Panasonic lens?