Pandora's Box

So, now that a new Pandora online music month has begun and I'm allowed back on the site, I'm hesitant to cheat on GrooveShark. I like Grooveshark. Especially now that I've begun listening to other users' playlists. This revives the surprise factor Pandora stations provide - songs I've never heard, bands I know not of, an order I didn't create. And without the commercials! So I'm torn. To reopen the box or leave it shut? That is the question.