Well Mr. Anaxilus, nice trap... but it won't work this time! Bwahahaha...
So, here's how I 'hea'r it... The M50, D7000, DT880, DBA-02, etc., are all relatively 'bright' to my ears, but with varying amounts of lower-mids and bass. I really think that the clarity of the upper-mids and highs are the one characteristic that all my favorite cans have in common. I know you think the M50's have good sparkle, and that's what I'm saying... the SM3's did not have that, and so... they're gone. They gotta have the 'crisp'... Added sonority (M50, D7000) just increases the enjoyment.
Fair enough. Bright, but not Cold. Not only did the SM3 not have it, neither did the DDM. Or the 530 for that matter.