Hi all, Do you guys buy your music from itunes or amazon. I just looked at it and for most part it looks like amazon is cheaper. Soem songs even priced at $.0.50 in amazon vs. $1.29 on itunes. Will the music purchased from amazon be compataible with all apple devices. Is there a notable difference in sound quality? I need some suggestions. If I but a song from amazon can I download it to all my devices?