Streaming music paid app I am getting really annoyed by the number of ads that I get in Pandora and am considering shelling out $36 for the paid version.

Are there other streaming music iPhone apps that I can review before I make a purchase?

This will be used in USA.
You can download and try Mog and Rdio for two weeks a piece.  They both also provide Desktop streaming as well.  I've tried both and prefer Mog.