I'd recommend the K601s without hesitation, both for use with a Headfive and for electronica. No, the bass isn't the biggest ever, but it's more than big enough - I certainly wouldn't want anymore with the likes of Mouse On Mars, and with Orbital it was just right. Also the head/soundstage is terrific, and really gives a sense of space and movement with electronica. I upgraded to these from HD595s which I found dull by comparison. The K601s do rock much better (livelier, more forward, but still no Grado) and also handle intimate acoustics and large-scale pieces better thanks to how they express space. The only thing is that they will mercilessly reveal bad recordings - I have my MS-1s for stuff that's mixed and mastered badly, and I when I really want to rock out.