I'm moving from an 8GB Nano to a 160GB Classic and will now have room for all of my music, photos, videos and movies. I'm new enough to Mac that the more I learn the more I want to do things over... more correctly. So when it comes to iTunes, I could use some expert advice so that I don't have to import and re-import my stuff. I realize my questions are elementary, but I want to do it right: 1. Now that space is not a concern, what format and bit rate is best and why? My meager 8GB is Mp3 at 192 Kbps. 2. Can my existing library be converted to a better quality and bit rate? Will it sound better? Or would it have to be imported at a higher bit rate and format for me to hear a difference. 3. Is a Time Machine back-up to an external hard drive enough to reproduce my iTunes library should the worst happen or should I do something else as well? Thank you all in advance for your advice and for taking the time to indulge my "beginner" questions.