Yeah, Sigur Ros are excellent to write to, I don't usually like writing to music with words I can understand!
About, I'd say 30% of Sigur Ros's lyrics are in Vonlenska, so even they don't know what they're singing. Take () for example, it's all in Vonlenska.
Crocodile Tears by Billy Woods
If you like old-fashioned Rap, not the new crap that's coming out, check this guy out.
He wrote a 1 hour 14 minute long album, about the troubles of life, politics and situations around him.
This man does not repeat chorus, over and over again to fill time. He does not talk about his bitches, money and people trying to kill him.
This man cuts the crap and raps, final.
That said, he's not too good. He's good, yes. But he has a lot of room to improve, which is always good.