As Van Morrison sang, "Turn up your radio!" That's what Canadians keep doing year after year. Between 2006 and 2010, Canada's radio market experienced the second biggest growth in the world behind only China (about $500 million). That means people love listening to radio so advertisers love to spend their money on stations. Although the listening is free, the downside is there's not a lot of variety. If you're looking to discover something new, satellite radio is an interesting option. Sirius, for instance, features hundreds of stations catering to pretty much every taste. There's the initial cost of a radio to think about (between $50 - $150) and then an annual subscription fee of about $160.