I am no super expert in headphones, but heres what I think
the bass is very rumbling. I think that it wasn't as thumping or hard hitting as i would like it, but i really think that is because i am using the dt770 velour pads. when i put my hands on the outside of them, i can feel it hitting harder then it does on my ears.
the middle ranges sound good enough for me, definitely clear and smooth.
the highs sounded peerrrhhaps a bit hushed, but i haven't seen anyone else say that.
the sound really surrounds you and has a decent sound stage. it is really fun and i had a GREAT time moving and grooving. that being said i had plenty of room to get groovy BECAUSE OF THE LENGTH OF THE CORD. i got a replacement cord that is about a couple feet long.
the isolation is meh. it does a good job at keeping noise out, to be specific i am wearing these and listening to music and i cant hear my fingers on the keyboard even though it is usually very loud, but other people are able to hear what im rocking out to.
about the clamping force. it wasn't a problem for me. i didn't spend any time stretching it out and it fits nice, although i have a small head and like a tight fit.
another thing. although i haven't read much about other people who agree with me, i hear sibilance. and on some songs, its painful. just a warning
any way guys thank you so much, just thought that i should put my opinion in!