One of the forms of experimental music that I'm most drawn to these days is glitch core (all electronic. ambient. no vocals, please). I can't put my finger on it, maybe it has something to do with the sounds themselves. But I respond to it, physically, in much the same way that i respond when playing Bach's keyboard works.
More about the glitch scene here. And, yes, I believe it is cheaper than therapy.
Listen up here.