Recieved the Denon D7100 headphones few days ago.. i bought them after having few other audiophile headphones and these are the most expensive headphones i ever bought.
My 1st good headphones were Denon D5000, back then, i was not so impressed with them and looked for alternatives. I sold them and bought the Sony Z1000, the sound of the Sony was much worse, it was not so full and without the comfort i got used to in the Denon. So i replaced them with Sennheiser HD 650. For my ears it was not much better then the Sony Z1000 and the sound wasn't so good (sorry i don't give a full description since i'm not an expert).
So i thought to go back to Denon but this time to invest in the D7000 - when i looked for them i realized that the D7100 has been just released and i bought them for 1066$. (+import tax of 200$).
I read lots of reviews here and around but i can tell from my experience that they are not disappointing, they sound amazing, they are the most comfortable i ever had, their sound is very clear, full, comfort and for me its a nice upgrade. The price tag for them is very high but compared to everything i had, they do the job and that's what matter.