Got mine in a couple of days ago and now have 10-15 hrs on them - so far I am quite impressed. I dont listen to as much bass heavy material, or listen that loudly, but I dont think the bass is that bad out of the box.
For $200 I think the sound is actually pretty amazing. I usually always start with Steely Dan and some Donal Fagen to check out a sound system, and thought the D2000's were pretty sweet across the spectrum. Detail/transient response was really good, high end had great sparkle but wasnt harsh. A little Flecktones and Victor Wooten also sounded pretty nice and I thought his bass sounded pretty tight. But again, I dont listen loud, and all my listening so far was not eq'd / totally flat, but still thought with little break in they are really good and hopefully will get even better.
I haven't listened to any of the current top tier phones as reference, so I probably dont know what 'great' is these days, but these Denon's with a little break in sound pretty damn good to me.