As a new ipod owner I am in the process of loadig all my (400+) cds onto my mac/iTunes library (for eventual update to the iPod). My question is, once I load a CD onto the mac/iTunes - is the format it's stored in the same as what was on the cd - is the quality the same? Can I then giveaway/sell the cd? or must I keep it still? Is there loss of quality when a cd is loaded into the iTunes Library?