If you want to only shoot with native lenses, then Micro Four Thirds is preferred system. There's already a huge native lens base with still even more coming.Thanks to you all that respond. I've been wanting to try the NEX line, but cannot really afford another system. So was considering just moving completely to NEX. I don't have auto focus lenses at this time for my E-p2, just my adapted lenses. I stay mostly with 24mm and 50mm now. I'm pretty flexible with focal length in that range. I do mostly outdoor rural, close-in and macro, with occasional family pictures.
I agree. If you're going with adapted lenses then NEX is far and away the best choice. I think of it the same way I would an M8. Great IQ, works wonderfully with MF and unlike the M8 very pocketable (depending on the lens). If you want or need native lenses then m43 has a better set of high quality lenses available that NEX cannot compare to in selection or quality throughout the range. Since there are times when I need both I maintain two systems. That said, if I could only keep one I would probably choose the NEX because I could sell my remaining m43 lenses for more than my NEX and legacy lenses would fetch.If you want to only shoot with native lenses, then Micro Four Thirds is preferred system. There's already a huge native lens base with still even more coming.
BUT....like you said, your only lenses are adapted ones and if I was only shooting with adapted non-native lenses, then I'd go with NEX for sure!