When I was reading about the rebuilding process taking 8 hours to days, and some of the old drivers have to be updated, etc.. it seems like it not worth the headache. You might as well back up from a day old back up to a new computer, and not worry about the "redundancy" for a 1 doctor practice.
Optimally, you want to combine the two. Most rebuilds do not take days. More like 24 hours. Redundancy is not even close to backups. I would much rather have a drive go down, pull it out and pop in another and let the RAID controller rebuild it while I continue working.
I would hope if you used your backup you would install a new drive and restore not try to restore to a new computer. Most backups are not compatible with a new computer IF you are doing a bare metal restore.
