These things are crazy, detail and separation like you've never heard! Heavily amp and source dependant but in all my years being an audiophile I've never heard anything so nuanced. Some albums I've been familiar with for almost 40 years and used with some great equipment now extracting sounds like I've never heard, nothing is left in the recording after these. And when well-matched it sounds nice and spatial as well. Didn't want to like these, they're expensive, and I'd rather save money, but now I've heard them there's no going back. Nothing I've listened to has come close to this much highlighted within the recording, it's all present and portrayed where it all should be.
They are very large, and you never forget your wearing them, but as big as they are, they're still fairly comfortable. I was interested in the Hifiman Arya as well, but I think the comfort of those would get to me, and I'm not that keen wearing headphones, but these Senns just about get away with it for such large headphones. Higher exotica headphones don't appeal to me, they cost way too much, and I can't see them beating these at nuance anyway. I am no longer even interested in trying the Arya's, the 800S are end game for me. And I tried a few of the Senn lower models as well series 6, they didn't really do it for me, the 800's were a gamble for me that paid off, I'll cherish them!
Vocal and instrument timbre is just amazing as well.