I have found the Real Music Store (located inside RealPlayer 10) to be the best
of the bunch. They offer 192Kbps AAC files, so the quality is great. RP10 will
burn CD-Text onto the disc, and can then read the CD-Text if you need to rip
those files as MP3s for use on a media player. Many Palm PDAs will play the
RealAudio 10 files without conversion.
Real took Rhapsody's already excellent interface and made it even better.
Unlike the iTunes Music Store, you can navigate to another page while previewing
a track. The pricing is comparable to ITMS; $0.99/track or $9.99 for most
albums. http://www.real.com/