RNM if you got it (or can get it for free if you really dig around...hehe). This is great for burning just about everything (except protected movies and PC CD's).
DVDDecrypter is the best for just flat-out copying via ISO image or in conjunction with a re-encoder for backing up DVD movies.
Together, these are an invaluable toolset for backing up your CD/DVD originals. Combine it with CloneCD and CloneDVD, and there is virtually nothing you can't backup.
If it ain't broke don't try to fix it! But, hell if you can tweak that bastard just a little bit more....hehehe.