One thing I have learned through 15 years of Professional computer experience is "Just enough information is not going to let you necessarily make the right decision the first time" and none of us really want to spend the money twice if we don't have to, but... you can read what I have experienced and go from there, if you wish.
http://www.westcoastkaraoke.com/newsletter/in-sites.htm
I use two Plextor 48x24x48a drives, DiscJuggler for "Backing up" my karaoke cd's and MTU's Microstudio and Keyrite for custom compilations to fit my vocal needs.
also, some of Top-Tunes and Sound Choice's cds are MediaClog protected, the older version of this you can pull all but the last track off with microstudio and the last track with discjuggler, reburn the last track and transfer it into microstudio format, then reburn the entire cd. The new Sound Choice protection format won't let you do this. Something about a cd+g #2 format, the first part of the track has an .mpg extention on it
Karl