Radiohead did an experimental thing with their last CD, In Rainbows, where they let people download it for whatever price they wanted to pay (including $0). I am not as much a fan of In Rainbows as their other albums, but you could look up "All I Need" or "Reckoner" from that album and see if you like its style. It's very different.

I love the video that guy made for that song. It actually makes me sort of emotional.