For those who buy compressed albums/songs online for your iPhones, where do you currently purchase your music from? And why? I have recently decided to stop buying CDs, as I never listen to the original lossless formats anyway, and CDs just take up too much room. And I have this nice shiny iPhone 4 (well kinda shiny after 9-10 months) which allows me to use either AAC or mp3. But I like sticking with one format. So I am considering buying either from iTunes or Amazon. Aside from seamless (or not so) integration and ease of use, what reasons have you guys (or gals) chosen to go with one over another? By the way: iTunes rip their songs in 256kbps AAC Amazon in 256kbps VBR w/ Lame encoder If Apple ever came out with a new format, based on their history, I know they will charge for an upgrade for every song ($0.30/song last time). However, I am also wondering how Amazon will handle this now with their cloud storage. The music that's bought from them and "stored" online, when they change their formats someday, do they get upgraded automatically at no charge? I am sure they don't have separate copies stored for each user (at least the music bought from them).