I tested M80 H.P.s and M100's at Axiom's listening room and (disclaimer: I am not an expert by any stretch of the imagination)I preferred the M80 H.P.'s. Cleaner Mids and Highs to my ears. Spent about an hour going back and forth between them with the A/B switch listening to different music. I wanted to like the 100's better but I didn't.

M80 H.P. / Bryston B135 cubed / Streaming