Saki,
As a new owner of M60s, I can relate to your problem with the different sound - compared to what you were used to. Call it lack of "punch" or whatever, but the truth is, when you change to speakers that have a significantly different sound, - believe it or not - you really have to adjust to them!
DO NOT BE AFRAID to adjust the tone controls on your receiver!!!! They were put there by the engineers/designers to help compensate for room acoustics, differences in speakers and personal tastes. We do not all hear the same, nor do we listen for the same things in our music. If turning up the bass gives you the punch you are desiring - then (my advice/opinion) turn it up!
The "audiophile police" are not going to come around and arrest you for using them.
Ian's suggestion about using a sub just may be the thing you need. I use my subwoofer with both HT and stereo music. I have gotten used to it and I like it - so I use it!
Good luck!
Randyman
