I'm looking at buying "My Book World Edition II WDH2NC60000 NAS server - 3 TB x2". This has built in RAID 1. The price is about $450. First, any thoughts on if this is a decent product? Second, how can I backup the NAS to a 3 TB external drive. I use Acronis home version now for most my clients but I'm not sure this will work on the above NAS. Thoughts? My client will never pay $1000 for backup software.