I've only used Ghost to do entire disks in direct one-for-one images. In earlier posts I presumed that Ghost cannot do folders but instead only disk images like Partition Commander. Whatever software you use, it will need to recognize and work with RAID, whatever backup medium you use (probably a USB drive, as Partition Commander, Acronis, and Vista Ultimate's backup program are all incapable of recognizing the Blu-Ray writer), and most of all the ability to make and restore backups of individual folders because you must be able to backup the C:\\Program Data\\Microsoft folder on the XL3. Acronis happened to come with my 750G Seagate drive as a freebie and I was able to upgrade to the full version with a big discount (see my 9/11/07 post). One thing I don't like about Acronis is that you have to turn on your external drive at the right time or it won't recognize it.
If Ghost does all that then I suspect it would be fine as well.
P.S. I kept my latest Partition Commander upgrade because my older version gets confused when faced with very large partitions (does everything right but the graphical representations of the partitions is all wrong) and the new version fixes all that. Acronis will not work unless you have more than one disk, even if it's an external drive that isn't involved with whatever you are trying to do at the moment. That's a huge disadvantage for my other computers, where I keep a hidden partition with an image of the C: drive to restore if I get a virus. If I try to run Acronis on those machines, it tells me that it can't be used on a machine with only one drive. What a huge design flaw! Therefore I have to have Partition Commander for those machines. If Norton Ghost will also let you image one partition to another partition on the same disk as well as backup individual folders, that would be a winner.