General :: How To Get Complete Backup Of Whole Computer

It's about creating a complete backup of my machine. What I want to do is completely backup my whole computer, everything!, because I've got it just right. If something were to go wrong then I want to restore right back to the way the system is right now (from a rescue disk). I know that using dd to do a byte level backup would be best but I read that it's not all that great for restoring the system (HDD's sizes must be the same).

Rsync looks favorite but can it copy the root directory. i.e. "rsync -a / /media/backup/" and all the partitions. I just not sure whether it can do the whole computer. Dump is another tool but it seems to have dependencies to tool versions. And again I don't know if it will do the whole system and how easy it is to restore. There is a tool called FSArchiver that looks to do what I want and it comes part of SystemRescueCd (a bootable CD used to fix computers). It turns out that the backup I'm looking to do is at the file system level where the tools above are really file level backups.