Its bizarre that your list starts in 1993 - pretty much the time that Sennheiser started going done hill ?! Now, before people freak out. What I mean is that the HD540 Reference 1 and the HD250 closed back, for example are 2 of the finest headphones ever made, with a natural true to life sound that they have now completely lost. Even earlier models such as HD430 & 414x at least sound more natural than some of their later headphones. IF they...