Sean's is a paid review site. He just published his comparison of these cameras using LR 4.4 and C1. The resolution winner at low ISO was the DP2M followed by M followe by RX-1. The M and RX-1 were very close. The high ISO winner was the RX-1 easily besting the others to produce cleaner files that retained color and DR over the others. The Fuji did not compete well when using LR 4.4 but did better with C1.