Backup Solution

There is nothing wrong with distributed backup, unless you are a financial institution.
Some countries require a minimum of two, physically distant sites, to have duplicate copies of the data. (It saved the U.S.A. on 9-11)
If bandwidth is expensive, and you are not a bank, broker, insurance company, etc. , staying with local backup is cheaper.
Unfortunately, from a cost point, tape is still the most reliable method of off site storage.
Remember, if the building is burned down/destroyed, itdoes you no good if the backup is in the building.
So the tapes have to be stored somewhere else.

If you have access to cheap bandwidth, then using mirrored servers, in two different locations, is a good option, because hard disks are cheaper and faster than tape.
Good Luck, I hope you can analyse the costs of the two approaches easily, in your locations.
Regards, Chris