I've been blasting these for the last couple of days and they're just as I remember:
-tight bass
-awesome mids
-great isolation
-indestructible
-light as hell
-still ugly (in fact, more ugly than I remember)
It's such a change of pace from the loose bass of the D2000s, not to mention the D2000s have those sparkly highs. But the Prat is amazing on these, not to mention the return of vocals. I love my D2000s, but the isolation of these headphones, portability, durability, and mids make them my current favorites. I'll get back to the D2000s, but for right now, I need to familiarize myself with the sound of these headphones.
I know it's not fair to compare the two, but yeah, nice change of pace. The D2000s are my Sunday morning relaxation headphones while the HD25 are my on-the-go get-out-of-my-way, everyday commute headphones.