I'm going to be re-ripping all my cd collections to mp3 using itunes. i googled information as far as what mp3 bit rate to use. but there are a lot of differing answers. All i know is that I will definitely want VBR enabled with the highest setting. i plan to go with 192 kbps or 256 kbps. I plan to upload my music to my iPhone and listen to it using the earbud headphones. I am not an audiophile by any means. But all I know is 128 kbps listening to my car via bluetooth didn't sound too good at all.