The Denon headphones AH-D7000 is reviewed very well in "Secrets of Home Theater and High Fidelity."
Chris Groppi writes "If you are looking for the best possible sound quality (i.e. frequency response, clarity, tonal accuracy, retrieval of detail, imaging, soundstaging, etc), at the lowest possible cost, headphones are unbeatable. The Denon AH-D7000s, when powered by the HeadRoom Ultra Desktop amplifier and DAC, offer world beating performance at something like 1/10 or 1/20 the price of admission for an equivalent loudspeaker based system." Read more at: