I personally don't like them in electronica too much. It's not their lighter bass that's an issue, it's that they are detail monsters, and with electronica, that's kind of lost since there aren't many subtleties. They also kind of lack for anything heavy, since their entire presentation is airy. Oddly enough, I prefer my 990's for some larger classical too, since I like the heaviness sometimes. But for quartets, solos, and most larger ensembles, they are AWESOME. I would keep these, even if I could only play classical through them. Details opened up to me that I haven't heard on any of my other cans. Songs I DO like on here (and artists too), however:
Toad The Wet Sprocket- Fly From Heaven
Little Dragon-Turn Left
ANYTHING Classical
Modest Mouse- Gravity Rides Everything (actually MM sounds absolutely astounding, like high-inducing it's so good)
Opeth- In My Time Of Need
Pinback-Chaos Engine
MOST Rush.
Black Mountain
The Black Keys
The Melvins
Toro Y Moi- Talamak
just to name a few that I remember
if you notice, most of it is pretty chill. The K702's can get excited, but I enjoy the firmness in sound of my 990's for that.