I'm 100% sure I'll never replace my D2000 with any other *current* model headphone on the market today. That's how strongly I feel they got it right. I may ante up for a D5000 if I got a pay bonus burning a hole in my pocket. Until AKG, or Sennheiser come out with a new flagship headphone, I'm out of the market for full-sized headphones. For once, I feel like I don't need to buy more hardware, I just need to find more music to feed into the Denon.
I've always felt that neither the AKG K701, HD6xx, nor Beyer DT880/990, nor any Grado really had the tonal balance right. I sold them off (I still have the AKG, but I might sell them off too). They were either too veiled, too thin, too bright, too bassy/warm, etc, there was always at least one flaw that had me reaching for the EQ controls. But the D2000 gets it more right than all of those contenders. So I agree with Headroom that objectively, this headphone ranks up there with the best of them.