If you're thinking about paying for a streaming service (the pay ones let you pick your own tracks, rather than function "radio" style), don't rule out Rhapsody. It has mobile clients, a PC client (or a website), plus many receivers and other audio devices include support.

http://www.rhapsody.com/

I've been a member for almost 8 years.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris