Electropop, I understand exactly where your coming from FWIW. I've been auditioning a pair of SRH840's over the last week, listening unamped through an iPod with a variety of different styles of music within the genres of music that I like. For the most part, I find that there's a mid-range focus on the 840's that is somewhat unnatural. It results in a congested mid-range that makes it difficult to decipher complex passages, and also causes some sibilance in the upper part of the mid-range. However, it also produces that "euphoric" presentation of female vocals that can please some people.
I find that the bass is easy to hear and follow (though it is what I'd consider to be lean) in simpler arrangements, but when the mid-range gets congested with guitars/vocals/pianos/etc., the bass drops out completely and all I hear is that congested mid-range. IMHO, this isn't a balanced piece of gear.
FYI, I'm not a huge "headphone" guy, I'm much more of a HiFi guy...and have spent good money on my HiFi gear to avoid 2 problems which seem to plague this headphone: 1) congested mid-range; 2) mid-bass hump. These are 2 fundamental items that make a piece of gear sound somewhat clinical IMHO, and a clinical-sounding piece of gear impedes my ability to follow the music.
That said, these are not what I'd call bad headphones. Their sound signature is somewhat comparable to most in-ear monitors that I've heard...that's just not a sound signature I'm looking for in a full-size headphone.