Just got these in, and my first reaction was that I didn't really like the slightly thick bassiness, I thought the trebles are just a bit muted, resulting in a loss of "edge detail", separation, clarity, and what seemed a bit less soundstage, and the bass was a bit lacking in "bass texture". I'm comparing them to my Shure SRH1840, which I really like a lot, save for the very occasional slightly piercing high end. My general takeaway after 20 minutes was "meh" for the Senns - I'd hoped for more. But ... if these are gonna change slightly over the next 100+ hours, what might that bring? Maybe I'm just one of those people who likes a more detailed, precise and clinical headphone (perhaps the older HD-800?). And my Shures seem to be delivering a bit more bass than when new, so I have no problem with that. I tend to listen to a lot of jazz and non-vocal stuff on my headphones, fwiw. And maybe I'm just so used to the Shures that I'm not hearing the goodness that the Senns are bringing. Thoughts?