I hope this is the best board for this question. The optical drive that came standard in my iMac seems to chew/make grinding noises these days much more than it rips quality data. So I'm seeking recommendations for a replacement. I think my iMac only has USB 2.0. What would be the best external optical drive to keep on my desk for the sole purpose of ripping my CD collection? Preferably something designed to handle worn and/or older CDs quite well. What do you have? How well does it do? Thanks!