i need to convert a bunch of wma's. what is the best format to convert them to without losing quality? i mean, it's probably impossible, but i'm not sure. right now i can do AIFF, AAC, mp3, wav. i am hesitant to go to mp3, but i can't find any other info online. should i do something like, wma>aiff>aac? or is that just a waste of time?