Well, the micro-4/3 family is looking better and better. Optically, it is grat, but the one limitation is the lack of really fast zooms, but Olympus seems to be fixing this;
Olympus M.ZUIKO DIGITAL ED 40-150mm f/2.8 PRO lens coming in 2014, new ZUIKO lens roadmap, no more Four Thirds products | Photo Rumors
"The M.ZUIKO Digital ED 40-150mm F2.8 PRO (80–300mm, 35mm equivalent) also joins the new M.ZUIKO PRO lens category. This lens is currently under development, with a planned release in the latter half of 2014. It will be a telephoto zoom lens with a bright constant f2.8 aperture and will feature a dustproof and splashproof construction rugged enough for professional use."