The Japanese Digicame Info has compiled a good comparison summary:-http://digicame-info.com/2011/09/nikon-1-j1v1dxomark.html (via Nikon Rumors)DxOMarks V1 J1 P7000 E-P3 GF2 G3 NEX-C3 Overall Score 54 56 39 51 54 56 73 Color Depth 21.3 21.5 19.1 20.8 21.2 21 22.7 Dynamic Range 11 11 10.8 10.1 10.3 10.6 12.2 Low-Light ISO346 372 147 536 506 667 1083So, the m4/3 cameras are