I found this on Wikipedia and thought it was interesting, especially the "Quality of MP3 Audio" and the suggestion to use "Lossless compression algorithms". It's a good and informative read, I really enjoyed it.

Here's the direct link to the relevant section: Wikipedia MP3

Denon 5803 Denon 3910 Axiom M80ti's, QS8's VP150, EP500's (7.2)