Heya,
Guess I should throw my keys in the hat for the Denons.
I'm impressed. I actually find myself enjoying the Denon D2000 more than the PRO900 for bass music like Reggae Dub. It just hits those low tones at the same volume as the upper low tones, while still allowing an excellent mid range and some good highs, without being fatiguing or harsh. What a great headphone. Good for portables too. I just drove around with them on my Sansa Fuze and ran some errands and the bass was excellent. Then turn it around and listen to some acoustic and vocals and it did them really well too. Very impressed with the headphone. I'm completely intrigued with higher end Denons now in the future.
Very best,