Pros: chunky no nonsense sound
Cons: no refinement
Well hey, let me keep this short and sweet, after owning these i certainly don't have the passion to write a lovely long complimentary review because these are not worth the effort.
They are way overhyped - simply put...no refinement, sort of like a V8 Nascar taking on a Formula 1, get my drift, these are the V8, not the worst, but certainly not the best. They are a tad boxy sounding, and not as detailed as some other better ones, they will stand up and fight, but they will lose, simple as that.
The midrange detail slightly lacks, plus the bass is prominent only in a certain frequency range and not conducive to an open airy sound-stage; actually they sort of have a similar sound to the Sennheiser 449's, but these are better than the 449's with more punchy bass attitude and a bit more detail, but overall, the hype surrounding these is not justified, believe me!
They have a 'slightly' darkish overall tone (not excessively) much like the famed Sennhesier HD600.
The treble is clear and present and slightly prominent but the midrange is 'slightly' recessed, almost as if a bit of the midrange was lost in a black-hole out in space which is not immediately obvious until comparing to other higher-end headphones. The bass is a bit bog-standard, it has punchy emphasis around the 50-80hz range but does not evenly distribute down to 20hz, it sort of cuts off at the 50hz range and could be described as a tad boomy. Overall, in general, a good performer, but there are more accurate audiophiile headphones out there.
prices are largely dependent on where one resides. In canada you're looking to pay 160-170 for the M50s and it's bot a stretch to pay 200 in stores or maybe in another country like European countries.