I can very easily tell the difference between mp3 and uncompressed WAV. Especially with orchestral music. I don't know how to describe it... cycling? Wahwahwah.... It's very obvious.

I know there are different methods of encoding mp3's, but based on the mp3's I've heard, CD's beat mp3's any day.

In fact, I was in the car with a friend and he had on a Star Wars soundtrack CD. I could instantly hear it was a compressed copy. I asked him about it and sure enough, it was not the original album. He had burned mp3's.

I have to agree with Arnie; I love the physicality of a disc, not to mention the liner notes and the case and so on. I don't like downloading music.