|Now just because you heard and didn’t like the W2002 does not mean they are a bad headphone, it just means they weren’t to your taste. I would say there are plenty of people here that would say they blow your 580’s out of the water but they don’t pounce on you for expressing your opinion.|
But since you brought up the aspect of "total cost of ownership" of headphones, which would include at least an amp, I would go out on a not-so-fragile limb and say that if anyone were to compare the $750 (or more) W2002's by themselves (no amp), to the HD580's with a $300-500 amp, they would agree that the Senn's do blow the A-T's out of the water. Of course this is unfair too, but you brought it up.
My main point is that you feel cheated that the Senn's lured you in because of their entry-level pricepoint, and feel there are other cans that are better suited at that price. If all you want to do is spend $150 and be done with it all, I guess I could agree with you. But I would say that they are a bargain and allow someone to get into decent sound inexpensively, and preserve their purchase as they (inevitably, IMO) get better equipment around them.
I think we basically agree on the "data", just differ on our perspective on its worth to each of us.