Listening to Alban Berg Quartet's "Trout," and it is just absolutely stunning. It makes me cringe inside. If you own the headphone, you owe it to yourself to try out at least the first movement. Absolutely mesmerizing. Words simply fail.
I have heard HE60 and few other mega-buck cans! (Not mine!!! ) Though they are better in many ways than HD650 its not by very big margin. RULE OF DIMINISHING RETURN!!!
I love my HD 650! It pairs with every piece of gear I throw at at still surprise me me improvements of sound.
DA100 > GS-1 > HD650; I am content for quite some time with this magic sound!!!