Having multiple datacentres means nothing unless YOUR data is actually stored redundantly in different locations. And the only way to guarantee that would be to purchase a package that includes that service, which would likely cost a premium.
The other way to do this is to simply make multiple backups with different providers, provided that you can ascertain that provider A isn't just using the same back-end storage services that provider B uses.
Very good point. If so, then it doesn't matter which service I go with because I will definitely sign up with one of the cheapest home plans. The only deciding factor now is how fast they can ready my data in the event of a restore.