I really got to check out SpiderOak.
Cool. Thanks!
You do get what you pay for when it comes to cloud storage. We use Dropbox in small office where I work to sync files between about five different computers. I tried switching us to Google Drive (because free) and it was completely useless at syncing files between the computers. Took forever and got weird errors where stuff woudln't sync.
I would think for straight backup though that Google Drive would be good since it is dirt cheap.