Re: My rant on today's pop music
I think King Crimson are about as experimental as Rock will ever get.
If you're wanting contemporary, actually experimental composers, then you're talking Sachiko M., Masami Akita, Christian Marclay some Truax (although that's not even experimental anymore) Antti Saario, Mark Wastell, Tetuzi Akiyama and a whole host of other names it's unlikely you've heard of. I would actually say that the big 'experimental' hub of the last fifteen years is Japan. Real experimentalism is largely non-existent here, although I like to think that I do a share of that sort of work myself.