Jim beat me to it: Christopher, go get Exact Audio Copy. I love iTunes, but I had some problems with ripping Star Trek: The Motion Picture. It was my computer that was the problem and not iTunes but EAC reports errors and iTunes does not. So I knew when I wanted to rip 15 CDs I wanted them to be right. Plus EAC will read the track titles right from the CD Text on the CDs.
As for the Label X and Varese re-recordings they are all available on iTunes. Or at least they used to be.