No, the thanks is to you- for reading it!!
I don't have much confidence in transporting the denon series headphones on any regular basis. I always treat them gently, as them fat earcups are held in place only by a small 5mm wide connection to the headphone frame, so i'm yet to experience an incident.
I've heard them grado's a few times- not that bad. These headphones were talking about here are of course in a completely different league. But if you're sticking to closed back, isolating designs, then that makes the job of finding a headphone easier. It's just narrowing down what you can look for really, as does usage from an ipod with an amp. Massive convenience +++++'s to using any headphone out of an mp3 player compared to some of these beasty rigs you see flashed around here.