So why is this question so common?
First impressions linger, and sometimes fester. I remember a sales guy at a company I once worked for who planted false seeds of doubt to win a $3m contract. Quite amazingly, despite a lack of any real or manufactured evidence, it was enough to swing the customer in our direction. BS works.
The M60 is less detailed/more forgiving than the M80, but in the end you need to listen and make up your own mind. You could also consider the M50 if you are not happy with the sound the M60 delivers.
