Hey everyone. Got the HD-25-II-Is today. I have to say, I am thoroughly impressed. The bass is very, very punchy, but it doesn't rumble and overwhelm (and ruin) the musc. Listening to Marduk's "This fleshly void", there's a very nice separation of the chaos, and Mortuus' painful vocals sound utterly hideous. Fantastic. Haggard's awakening the centuries was practically a foreign album. Likewise, I can really feel the overwhelming, desolate sense of feeling lost at sea when listening to Ahab. These headphones capture all of that so well. I'm shocked at how well constructed these appear; My spouse took one look at them and said "yeah, I don't even think YOU can break them". And speaking of my spouse; Noise-isolation? YES. She was evidently screaming to get my attention earlier, and I heard nada ^_^ This is good and bad, because she's going to shoot me one of these days.
Pat Martino was also quite enjoyable. I noticed that you can not just pick out each bass note, but you can also hear the bass player's fingers hitting the strings distinct from the amplifier on live at yoshi's.
I will be listening to these all day, and will report back with more information later. These headphones are extremely comfortable.