The most pleasing sharpness I 've seen in a photo like this ...

... , the sharpness is so natural , fine , smooth, without a slight touch of digital photo look ,

Sony RX1 and Sigma DP2M's can produce crazy sharp photo , but theirs have a touch of digital look , please see this X100's photo below ;

http://www.flickr.com/photos/nicolas_bourquin/8482035153/sizes/k/in/faves-63228590@N06/

Best regards
ccrodaca