Great for modern electronic stuff, but not so much for rock, though... Planar-magnetic sound is not fit for electronic guitars full detail and "crunchiness", specially if it's classic rock and slow paced rock.
They do great for metal though, because of the impact they can provide with such ease. Just don't expect to hear all guitar chord plucking, and the full vibrations of the bass chords like with, for example, the HD800 (since they great impact they deal masks much of the extension and micro-detail of all frequencies, including lower ones). Which can be (and to me, IS) really good for bad-records, electronic or fast-paced metal and loud, treble-happy, stuff.
That is, to my ears, of course.
Edited by faverodefavero - 6/29/12 at 10:11am