I backup to a harddisk using an app called Super Duper (for Mac only) it copies/clones everything. If you're going to backup to cd you should use archival disks. DVDs are more fragile than CDs. Reliability is in the disk (and software) more than in the burner. While burning for archive, don't use the computer as it may create an error. One more thing to note is that faster speeds = less reliability.

Question the question. Answer the question. Question the answer...

I wish I knew what I was gonna say :oP