First, the subject of wides on the MM is a wide topic. Best to ID which lens range you are interested in - super wides (say 12-15mm), really wides (18-21-24mm), medium wides (28-35mm), for example... although these groupings are subjective. For instance, in the 35mm wides, there are so many good ones - CV Color Skopar f2.5, Zeiss, Summilux and Summicron both...
As to results - have to disagree with comments about LR transformation. There is a lot of good things that can happen converting color to BW, for sure, but the MM (especially the M9 for some and the M10M now) are remarkable cameras, taking exceptional images. The high ISO capabilities of the M10M allow one to shoot readily up to 12,500, if not 25,000, without grain. The images are more like medium format than FF. Its not for everyone, but they can be really mesmerizing to work with, having tremendous lattitude in the files.