Well i just received these cans yesterday. I gotta say I had high hopes for these things as i heard all kinds of good reviews. First of all they are a little big, i have to use them at the smallest setting and even then i wish they would go a little smaller. I actually find these things quite comfortable as well despite what others have said. When i put the on and fired of a Loseless version of The Eagles-Hotel California i was amazed with the sound they put out. They are very detailed and absolutely embarrass my HD280's. I took a few minutes to tweak the equalizer and oh boy am I in love. I tried song after song on my playlist and before i knew it I had the phones on for a little over 4 hours. Definitely recommended. Right now i am running these out of the sound card, i am honestly very satisfied with the Grado sound and don't see a need for an amp/dac (yet ).