Hey Tyll, have you stated which you prefer out of the two KRK's, subjectively, given you've had time to compare the two? My personal experience is, kind of, in conflict with your measurements.
I didn't really listen to coloration or naturalness, as I've stated here and there many times, but actually how well notes were distinct from each other. I don't think this can be heard that well with tonal pop, folk or other "easy-going" genres, for instance, but is very clear with, what I've come to emphasize a bit later, modal jazz or fusion. It's easier to tell about headphone's capabilities in this sense, when you can't "guess" what's coming next ie. what the tonic defines and whatnot.
Some of my views here: http://www.head-fi.org/t/570501/the-krk-kns-8400-you-can-have-it-all
In other words, the 8400 are more musical to me, but maybe not that natural (in sound) to many. The difference in what I stated above, which to me is "musical accuracy", was big. Any views from anyone?
I'm also really bad at taking the sound out of context (music) and categorize aspects of sound, like treble, mids and bass. So if anyone comments (and I hope people do!), could you make references to music and instruments instead of other headphones or free-of-context adjectives? This would help me out a lot! Thanks.
Edited by electropop - 9/16/11 at 2:00pm