Do you run or workout to music? Where do you get your music from?
This past Spring I discovered http://www.rockmyrun.com. Great site with a variety of music. Here's how it works: when you sign up you get one free credit, and then one free credit per month after that. Some of the downloads only require only one credit. You can also pay for extra credits.
There are many genres of music from hip-hop to country and everything in between. You can choose the length of your mixes and bpm's (beats per minute). You can also search for a particular DJ...I'm partial to DJ Little Fever's mixes. It will also tell you whether the lyrics are clean or explicit. You can even hear a sample of each song on the download.
Since becoming a "Run Rocker", I rarely ever download from iTunes or pay for downloads. Check them out, I don't think you'll be disappointed.