@Schopenhauer ,
@Brazenways
I just recently picked up a Denon AH-D2000, which I swear the music plausibly feels in front of me. The 7520, with its detailed yet closed-in presentation creates sounds that can be perceived more hard-panned left/right. I don't have too much issue with it, but I think once that soundstage collapses, then it makes it harder for the brain to interpret some spatial aspects.
The 7520 is such a fantastic headphone. While nowhere near as spacious as the D2000, it manages to be engaging with the full range of frequencies right up in front, without any obvious peaks or glaring issues. The 7520 also has more authority in the bass - more robust. The D2000s bass is neutralish, digs deep down and has a very nice quality to it. Highs on the 7520 are designed for engineer to mix at just the right volume in line with the rest of the spectrum. The D2000, the highs may be just a smidge too much for some, and north of neutral.
I picked up the D2000 looking for a more comfy headphone that might replace the 7520. Not a chance. And not in bad way.
The D2000 is easily now a favourite headphone for me. What some people might see as sharp treble to me is accurate and detailed. The D2000, with its semi-open design sounds almost fully open. Soundstage is ridiculously good for such a design. Really enjoying it. I've had to make a tough choice then, that instead of replacing the 7520, the D2000 are replacing my HD650s!
Ultimately, the 7520s couldn't go. Despite my comfort reservations I used them throughout my vacation, even on an 11hour bus ride. The 7520 are truly a full-sized closed sealed design, they are much better for mixing than the D2000, they are also very portable and rugged.
I'm really glad I got the D2000s and I'd recommend them over the 7520 to most people if just for home use. At a fraction of the cost, the D2000s have also completely (90%-ish) killed any cravings I had for the MDR-Z7 or Beyerdynamic T5P. The Z7 to my memory was nowhere near as sharp as the D2000, but it was a good can. To me the D2000 has very much an 'audiophile' presentation, where some of the most pristine recordings will shine but sub-par will sound very harsh. The 7520 I find can be listened to for a longer time without being fatiguing, but the D2000 this could be an issue.