Just opened mine about an hour ago. The bass quality is very good and I think definitely beats my denons. I think they'll sound even better with burn-in. They are more comfortable than I was expecting. I used to own the Hfi-780s, which I never really found comfortable. I was afraid the comfort level on the 900s wouldn't be much better because they looked similar to the 780s in pictures, but they are bigger and the pads are much better than the 780s pleather pads. So far I am glad I dropped the cash on these!
Awesome. I'm glad you like them so far. I've only got 35 hours on mine (all on my head) and they still sound incredible. Refinement will follow.
Yeah, I did extensive comparisons between them and the D2000, and the Pro 900 has much deeper and more apparent bass. Simply said, it's just better.
Keep us posted on how you find these in the future when they get more time with you. I'm curious to see if people appreciate the bass on these as much as I do!