I have to bump this, because after about 50 hours of burn-in I'm quite dissatisfied with the HD 25.
I have to say there isn't any dramatical improvement over ATH-SJ5, I expected larger amount of bass and also that certain songs would now sound more engaging. Sure, there is more detail, but the right-left separation is quite annoying.
For example Bear McCreary - All Along The Watchtower (from the Battlestar Galactica soundtrack). Both HD 25 and SJ5 sound just flat, distanced and "lifeless", while once I had to use the earbuds you get with the Sansa Fuze, and though it's horrible quality, it has decent amount of bass and the song was more enjoyable.
Hurts after an hour, very little isolation improvement.
That's just a quick summary of what I feel now, but if I put all of this aside, the first thing that struck me was insane microphonics of the cable and also the headphone itself, which is absolutely against the idea of portability.
Couldn't it be that it's a problem of the "Special Edition"? That the cable is cheaper?
I don't want to be rude, but I'm quite pissed, to say the truth. I didn't pay 240 USD (taxes, shipping, so the price is insane here), so that I'd have to pay 45 USD for HD 650 cable, which doesn't even have "L" jack, but a straight one (the current HD 25 jack is "L" shaped and I like it that way, a straight jack isn't good for portable phones).
So, right now, I still pray that the burn-in exists and that they will sound better, but I don't expect the cable to just magically get better.
I'm sorry for the rant, I don't want to flame, I'd like to enjoy them, but it feels more like a rip off and I don't expect there is any inexpensive way how to deal with the cable.
PS: Every headphone is more expensive here, so looking for something in 250 USD range won't help, since it would be for 350 USD here....
For example the SJ5 costs 80 USD here, but I still think they're worth it, because the only thing it needs is a Neutrik "L" shaped jack for maybe 8 USD.