Food for thought. I just recently read an article on the legality of coping CDs to your computer. I personally do the same thing and make backups for my car/work in case they are destroyed. They need to be replaced once a month at my rate of destruction especially in the summer months.
From:
http://www.washingtonpost.com/wp-dyn/content/article/2007/12/28/AR2007122800693.html
"In legal documents in its federal case against Jeffrey Howell, a Scottsdale, Ariz., man who kept a collection of about 2,000 music recordings on his personal computer, the industry maintains that it is illegal for someone who has legally purchased a CD to transfer that music into his computer."