Long story short, they're fantastic.  I bought my headphones from a display/test setup at a Magnolia hi-fi, I didn't want to wait and I got a great discount on them.  I'm sure the salesman still turned a profit of course. (I work retail, I have an idea of the markup levels.)  They're comfortable to me, and I don't intend to own many other headphones.
 
Only other minor issue is the reduced bass, but the clarity was the greatest on this model, short of spending another $600+ on some headphones.  The other models that had less clarity had a lot more bass, but were fatiguing and disproportionate.  And all the others were too tight for my head.  These were actually the most comfortable headphones I've had.  I do see how they could be more comfortable.  The sennheiser HD800's that I tried on were more comfortable, and did sound more open, just as clear and had more base, but I wasn't in the market for those.  Only improvement, would be some sort of actual bass speaker on the floor.
 
They are expensive headphones compared to other items I have purchased, but they are quality, so I can justify it.  I can hear everything around the room 90% as well with them on as compared to off, which is what I wanted.  Bad part is, I now search for better quality sound, I had no idea what lousy recordings there are out there, and of new music to boot!  I guess if most people aren't going to have good cans, why bother making things sound best...