Go try Google Music. You get non-destructive music sync (10,000 songs or something?) and a massive library. Plus, the curated stations are all the old Songza content that was pretty awesome. $10/mo
And you get Youtube without ads for the same price.
Their curated playlists are seriously top-notch. I've found so many new bands through the Blogged 50 and Gorilla vs. Bear playlists.
Plus, Google Play Music's UI blows the others out of the water. My favorite part is the "Play Next" and "Add to Queue" choices for unobtrusively adding songs to what's currently playing. Something that iTunes actually used to have, but then they removed it for no reason.
The best part of the deal must be no ads on YouTube though. I am not competent enough to block all of them on mobile even when rooted with adaway.
I think it is $15 for five people.
The 3-month premium promotion that Spotify is running doesn't hurt either.