Summary: The HD-600s are very good sounding Headphones with average build and to me below average ergonomics. With the HD-800, Sennheiser have shown they know better.
Pros: Great sound quality, shades of the HD800 at a quarter of the price
Cons: Poor ergonomics and distinctly below par build quality spoil an otherwise good Headphone
Summary: The HD600 are very good headphones, but presently the same basic sound signature, but better can be had in the HD650, and the same exact sound 99.9% can be had for less
Summary: very overrated headphones, i find them dull,not involving,and somewhat dark sounding,im using them with a creek obh21 headphone amp maybe there not a good match with the