I have HD800 & HE6. The HE6 as well has great performance on piano. My wife is classical pianist, she prefers the Hifiman over the HD800 on piano pieces. (driven by EF6)
Obviousley, I told her that these headphones cost not more than 200,oo Euros
Agree. I always had a great opinion on instrumental reproduction on my modded HE-6 vs the stock HD800. That is not to say the HD800s aren't very good too...