Hello there, I am looking for a pair of headphone that is closed back, over-ear and portable (better to be foldable). Basically, I am really into the sound of my ad2000x but there is no way I can bring it to work, so I did some research and bought the se535 for its similar sounding to the ad2000x. I love how portable IEM is, but I feel super uncomfortable during continuous listening, so I think I should get something else that also sounds similar to ad2000x. So far I have targeted on these two: denon mm400 & b&w p7，what do you guys think? any other recommendations? Please help me...Thanks a lot!!!