I love eMusic! I'm a fan of authentic world music, classical music, new age music, show tunes, blues etc etc, and there is a true wealth of all this on eMusic, so I actually prepaid for 90 songs a month, which means each song costs about a quarter. After I download it and copy it to iTunes, I copy and paste the album cover in, and doublecheck the genre. (Often New Age comes listed as Reggae!) If a nature CD has one track on each side, that means I've spent fifty cents for a CD that Amazon might have for $17.00. This doesn't preclude downloading from the iTunes Store, but I always check eMusic first to see if they have a copy of what I'm interested in.
eMusic: Digital Music As It Should Be