Why are you so adamant on defending lossy formats bigshot? Just because you've ripped your whole library to AAC? Again, I'm not going to make any claims that I or anyone else can hear the difference. Whether the difference is audible or not is irrelevant; there is a difference. The fact of the matter is, when you apply lossy compression, you take away information and no longer have an original copy. That's not up for debate, it's very much a technical reality. I know you're going to say that an end-user has no use for a lossless copy, but that is very much a blanket statement.