Just spotted in this month's What Hifi magazine ( UK ) a head to head battle of these two high end headphones. Thought I would post to let you know the outcome and throw in some comments from the magazine for those who haven't seen it. The Grado came out on top with 5 stars ( out of 5 ) and the HD800 received 4 stars.
Comments on the Grado review- ' music is remarkably open. airy treble and upper midrange, vocals and instruments float with superb insight and precision. Presentation is a little leaner than the Sennheisers, although bass is finely punchy and well timed. Where they win out over the HD800 is in their transparency and musical realism- their timing and dynamic sweep combine with detail to deliver your music with near perfect fluidity'
Comments on the Sennheiser review - 'sound really quite sublime, bass kicks hard and deep and there is intense precision and detail on offer. The only thing that counts against them is that for all their precise clarity, they don't muster the astonishing levels of instrumental realism that the Grado's do. As great as the HD800 are, the Grado's have an authenticity and openness that make the HD800 sound comparatively, slightly sterile'
They recommend using a Lehman Black Cube Linear amp to get the best sound out of the Grado's.
My god Are you talking about HD 800 when you said "No Detail to offer"! you should do homework duh! or have more listening time with HD 800