No dispute here, but I enjoy excitement on the top end. Thankfully there's a headphone for every taste in this hobby.
Anyway, I've been listening to the Edition 8 a lot in my office where I need the isolation, and it has reaffirmed why I've like the PS1000 so much. The bass punch of the Edition 8 is great, but it just doesn't have the excitement and clarity in the upper registers, and the midrange can be fairly dull. The Edition 8 signature is far less natural to my ears. The PS1000 in my system portrays guitars, brass, percussion, and vocals with much more realism. Only harsh recordings are harsh in my system.
I had planned on adding the T1 to my system, but I don't imagine that I'd be grabbing it over the PS1000 if they are sitting next to each other. I had a DT880 for a while but it didn't really appeal to me over the Grados I had at the time, and from what I can tell the signatures of the DT880 and T1 are pretty similar, technical superiority of the T1 aside. I'll probably opt for an orthodynamic in the future. The shelved top end of the LCD-2 makes me hesitate, but I'm still curious. I also wish that it wasn't even heavier than the PS1000. The HD800, T1, LCD-2 and Edition 8 all have dips somewhere in the upper midrange that don't suit my tastes and music, but the PS1000 does.
I like good gear, and all these headphones are top notch, but if the gear doesn't make the music enjoyable, then the gear is pointless. I've had enough gear in that is technically advanced that just doesn't have the feeling that I want from my music. The PS1000 has given me the most enjoyment from a headphone yet. It suits me, and I haven't been looking for a replacement. Still, I'll own more of these flagships in the future out of curiousity.