I woudn't say my m50's lack any clarity or detail whatsoever... in fact, I *love* the detail they give. I haven't heard the m60's though, and don't plan on it... I can't imagine them sounding any better than these!

I guess if some day I lost my m50's or out of the generosity of my heart, gave the m50's as a gift to a relative, I would go with m60's...