Well, images are great for deployment, but as far as backups we use normal backup solutions like Veritas, Legato or NT Backup from Server 2003 because it makes a shadow copy prior to it's backup. If you are worrying about a hard drive going bad on these boxes, order newer boxes with mirrored RAID1. This cost very little and will even boost performance on read I/O. Most venders have RAID SATA 1 & 0 integrated in their chipsets so the only cost would be an extra hard drive while purchasing. don't forget, you would legally need a Ghost license for every image you disburse.