Ok folks so I have been pondering recently. Would I have gotten a better sound out of a HD600 senn. Or is the D2000 as pure as I am really gonna get? Would it matter? Either way only reason I bought the D2000 was cause I got it for $200 on Amazon for Christmas it had some kinda awesome sale. Honestly speaking it does sound better than my HD555 but not by any massive scale. I am thinking if I ever have to buy another set of cans it would be the HD 600 I am wondering if it would be worth it. Offcourse I won't be buying a HD600 until maybe next 6 years. There is just something about the sound signature of sennheiser. I don't think anyother brand has.