Pros: comfy, sound nice
Cons: pads, cant find replacement
Purchased used from a friend. I shoe-gooed the pads to keep them going, but otherwise... I have AKG 701 and Yamaha yh-100 and I keep going back to these. They are as good as my other cans in many ways, but just not as demanding physically. I mean they are light and comfortable like a glove. The AKGs leave huge dimples in my bald head, where these don't. They need power, which I can hardly supply with my equipment. But they are a true hifi experience every time I use them and you hear everything like it's in your head. I'm having a hard time finding pads though.
Compared to my old trusty HD250-II, the most obvious difference is that these have a bit less upper midrange, making them a bit more "laid-back" but without loosing detail. Also the sound stage is bigger, which I guess is quite natural comparing with a closed headphone. It sounds like all muscians took a step back.
I'm using a FiiO E17 via SPDIF from an old CD-player, and I don't feel that I lack anything power-wise. But then again, I don't listen loud at all.