Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
backblaze

I actually find offsite backup more important than these contraptions. Something like CRashPlan is good because it's on a server in another location altogether.

I've been very happy with offsite backup using BackBlaze on my Macs. Very simple to use and setup, and you can set an encryption key so all data is encrypted before being sent offsite. Works well for up to a few terabytes, $5 per month per computer.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.