You can tame your HD 800's with soft silicon. Put your hands over both phones and hear what that sounds like. Back off your hands until you hear the balance you want. Use ( mash on ) "Mack's Pillow-Soft" silicon earplugs on the outside of the phones to match where your hands still had contact with the HD 800's. The Mack's are cheap -- 4$ for 12 -- and remove easily.
I found that a lot of the problem with the HD's for me came from their over presentation of the sound image. I need sharp focus -- what the thread author talked of with electrostats, but as noted, more openness in the sound -- but not so much that i'm at an amphitheatre hearing the Busch Quartet recording from 1939 blatted out into the void. Which is slightly how the the HD's slightly mush up the mid-tones -- mid-tones coloring up the wave and making the highs muddy and therefore too harsh sounding.
Yes, the Sennheiser's now look retard, but you're listening in the dark and they're on your ears and it's all inside your head now anyway, no?