Ok, had the M50's for a couple days and probably should not comment on them until they burn in for at least 100 hours or so... but.. 1st impression. I like them for listening. They are somewhat 'flattering' to me, especially in the low frequencies. Top end has a bit more sizzle than I'm used to as well.. Kinda like I pressed the 'loudness' button on my stereo. Not sure they will be good for mixing but I will try them and see.

What really blew me away with the Sony 7520's was the quality and detail I could hear, but they didn't sound 'hyped' in any way... they show up on Friday, so more on them in a week or so.

Going to get the M40's just for comparison's sake also.