Have had the 820 about a week. Bought from TTVJ through the link on this website. Absolutely love them. They look as if conceived by an unrestrained imagination, fantastic. The way the ear cups attach to that gorgeously sumptuous headband on the 800 series of Sennheiser headphones just does it for me. The sound, transmundane. Jesus Christ, did I just spend 24 hundred dollars a pair of headphones. Wait, I better do some more listening and get back to you.