Hi Doug -
Looks like a nice computer setup you've configured.
One thing to remember (you probably already know this): RAID can only protect you from disk failures. Human or software errors are not helped by RAID (say you accidently delete a file, a virus infects a file, or a program corrupts a file). For those types of errors - which are actually more common than disk failures - you cannot rely on RAID. You need to have backups. Do not consider RAID as your "backup". It is not.
Sorry - I don't mean to preach. But many people don't understand this. They say "I have RAID, so I don't need to backup my data." This is very very wrong.