Panasonic 20 f1.7
The GF series from Panasonic is, to me, the equivalent of the Olympus EP series of cameras. Fitted with the Panasonic 20 f1.7 (undoubtedly at present the best mFT lens there is) it makes for a small, fast and great little system. Fits in the palm of your hand if you don't use the EVF. However, I find myself needing an EVF (or OVF of course) with every camera I use.