All right, I've had these for about a week now, and I am LOVING them. They sound so much clearer than anything I've tried before, and all my music sounds really crisp. I find that I have to turn the volume up to drive these things, but when they're cranked up they sound amazing. They don't have much bass, as many pointed out, but overall they are balanced across the spectrum, something I can appreciate. They deliver a very natural-sounding reproduction of my music.
Overall, a great headphone that I would definitely buy again!
Do you have something that can power them with ease? The lack of power can sometimes result in the lack of bass too.