I am new around these forums so I wouldn't be the right person to talk about the subtle tones etc.
But what I can say about the build:
Mine did come with the case. I know some were wondering about that, but perhaps that is because mine is a pre-order.
Very comfortable! It clamps on my head just fine, but not so much that it hurts or causes pressure. I actually forget that its on my head..
The padding is very soft, and my ears fit inside perfectly without touching the edges.
The underside of the band is a foam feel, and I have had no problems with the top of my head feeling pressure like some headphones.
The cables are thick and seem of good quality.
Sound is very clear, and honestly the bass is exactly what I wanted! I was worried that neutral headphones would lack in bass, but that proved to not be the case.
I now understand what neutral really means, it isn't bass shy.. the bass is there as it should be normally. I'm a big fan of neutrals now, and don't think I'd ever want a more bass heavy headphone.
With some songs, the bass is intense enough that had I played the song with another headphone.. it would have been annoying.
I am not using an amp, but it seems to play songs just fine from my desktop computer, laptop and mp3 player.
I would like to purchase an amp though, but I need to find one that can act as an external sound card for my desktop, and also portable for my mp3 player. (I have a Sandisk clip zip).