Found this Simon Reynolds piece from way back when very interesting. (Despite being particularly unfamiliar with Sunn)
Followed that to this interesting essay (which I find apt, since most dubstep strikes me as dreadfully dull but I like what I’ve heard of Burial).
Yes, the conversation is a few years old, but the popularity of a few metal bands with the indie music nerd mainstream (and the general angst that produces in “metalheads”) is an ongoing phenomenon.
As an aside, describing metal lyrics as “intelligent” or, as a lesser prize, “more intelligent than pop music” is laughable and really, really beyond the point. You’re talking about a genre that encompasses both Municipal Waste and all those guys in clownpaint who got raped by the Swedish welfare state.
Intelligence is an ancillary issue at best.