I know this question has probably come up a hundred times, but I'm trying to get very specific here. (I beg your indulgence)

Let's say I want to listen to Dark Side Of The Moon, which I have on CD and my iPod, why exactly would I choose the CD version over the iPod?

What wouldn't I hear if I played the iPod?

If I'm painting the family room and listening to music, am I really going to hear the difference?