Ok, I certainly hope someone isn't spending 10k+USD in an audio system to listen to Britney Spears
.
On a more serious note, I went to see and listen to Prokofiev's Romeo and Juliet at the new national opera of Tokyo and listening to various versions back at home now just for fun. Well, this is truly awesome through the SR-009 but still quite a bit far away from the real thing (even when closing the eyes)... I feel the biggest issues with the headphone reproduction are 1) low level resolution (likely source / recording dependent), 2) imaging (likely would be improved by listening to binaural recording with personalized HRTFs), 3) feeling of sound projection during dynamic peaks
(likely would be better with an amplifier with more power reserve). Can't tell for the tonality as this is very much depending on the hall, seating, recording ... But, clearly the SR009 sounds natural and not artificially bright. I also I don't feel I am missing anything at either ends of the spectrum.