My advise is to give them some time.
I too found them a little harsh, especially on some female vocals. I have a Denon 3802 and listen to music in direct mode 99% of the time. Occasionally I would switch to stereo and adjust the tremble down a notch or two. I only did this on a few cd's, as most sounded fine.
I don't know if the M60's changed with more hours or my hearing changed (maybe a little of both), but I no longer hear a harshness. I've had them a few months and I wish I could tell you how long it took to "break them in" but I can't.
All I can say is every time I listen to them they seen to sound better than the day before. I am still amazed at the way they sound.
bill
