tried this cans again today.
maybe its the burn in or maybe its just me, but they sound better to my ears. i think i just grasp a better understanding on this hobby though, because just recently i discovered what D2000 lacks. I used to think D2000s are the perfect cans for me with sibilance being the only issue, but now i realized that i am looking for a fuller midrange than D2000s.
along with that note, I can see now what germania pointed out- these Sonys are reminiscence of the D2000s in the sense that they lack some midrange to my taste. they have a V-shaped frequency curve.
the bass is not as bloaty as previously. not quite D2000-level in impact and depth, but very similar sounding. and overall really nice, not overpowering the mids and highs.
compared to D2000s, the sonys suffer from the lack of instrument separation and imaging. D2000, with those qualities, sounds "clearer" and more effortless. hence it feels more hi-fi. but aside from those, the sony exhibit similar qualities.
now, compared to my beloved ES7s, of course the sony are lacking in midrange. but so far i dont feel that the sonys are as hollow-feeling as the denons. aside from the more boomy and present bass, what the sony also have is a smoother presentation than ES7s. some bits of songs that pierce my ears in the ES7s do not sound as harsh in the sony XB700.
the bottomline is that the Sony XB700 is a very capable headphone, especially if one can get them cheaper. it is warm and nice sounding, much better than my expectation- especially when looking at the gay packaging font. do audition it, you may like it. i still prefer my ES7s for the liveliness and forwardness, but if i didnt come from the ES7 i will definitely get these sonys.
sorry for the messy impressions; feel free to just ask and ill try my best to answer.