Maybe Head-fi needs a post like this every once in a while. As for HD800 burn-in, they don't change very much between new and 250 hours, but they do become less grainy and a bit smoother. I bought a new pair of HD600 last year and they also didn't change a lot with burn-in (nothing like Ultrasones lengthy process). The HD800 still remind me a little of my HE60, and yet I would still like my HD800 to be a little less bright with a little more bass - basically an HD600 with better detail, speed and soundstage. The HD800 are not as detailed as my stats and still seem slightly veiled when compared to my stats, although that is somewhat improved over the HD600. So, I really like the HD800 but they haven't made me want to sell my HD600 yet, and sometimes I like my high-end custom IEM more.