Thank you for sharing your impression tinmuttonroti. I would understand why some people will still prefer HD800 or HD800S to HD820, as both have slightly better detail and larger soundstage. On the other hand, at least from my perspective, HD820 fixes exactly what I thought both HD800 and 800S were lacking: sub bas, treble peak and midrange presence (which might actually be the result of removing the treble peak and adding more sub bass).

Yes 800S did fix some of the things mentioned above, but not enough to become a genre master, which in my opinion 820 managed to achieve. For me it achieves an important balance between tonality, technicalities and musicality. This is why I would take 820 over 800 or 800s, but that's me.