The R70x’s do render music fantastically. The same can be said about the HD600’s, but in a different way. I like the HD600’s more than the HD650’s, but I like the R70x’s better than both for music listening.I suppose it's true it's all relative... I covet the Klipsch HP-3 and even without having even heard them with my own years (yet!), I suspect I would prefer them over the R70x (and HD 600 for sure) for EDM, just based on what I've read about their sound signature from others ... I guess my point was that when I'm in "enjoy the music mood", any of my good headphones (and I count the R70x and HD 600 among them for sure) can really give me oodles of enjoyment for basically any music genre, including EDM, even if I might, were I to stop enjoying the music, conjure a thought that, "gee, this would be even more ridiculously fun on ___."
The HP-3’s would be a great progression from the R70x’s if you wanted to move up chain. They have similar tone, but the HP-3’s have much better build quality and sound more refined. They also sound bigger and give you more of what you like about the R70x’s. This could be partially due to the low impedance. The HP-3’s are easier to drive and sound good out of any portable device. The R70x’s do require some power, but I’m not finding them to hard to drive at all.