Somtimes I like to write in silence. Other times I like to write with some light music going in the background.
Music with words is too distracting for me. That's why two of my favorite "writing albums" are by Amethystium, the band name for a one-man composer out of Norway.
The music is lush, hypnotic, inspiring. I think you might like it. You can listen to some of the songs on Amazon. I've listed all three albums below in reverse chronological order, although I don't own Aphelion yet.
Update: Another group I've been listening to quite a bit lately when I write copy is called Acoustic Alchemy. Definitely a different style of music, but great if you like acoustic guitar. Here's a link to The Very Best of Acoustic Alchemy. (For the record, I own 4 of their albums: Back on the Case, Positive Thinking, The Beautiful Game, and Radio Contact.)