I just recently discovered that Canada's CBC Classical is available as a radio "station" on iTunes (no doubt it's been there for years), and haven't turned it off since. Commerical-free classical music from across the centuries, by top-notch orchestras, with no annoying commentary. And the running line at the top of iTunes helps you keep tabs on what's playing, helping to discover new works and composers that catch your attention. It's a fabulous way to enliven one's own tired playlist and doesn't cost a dime. O joy!