Looking for the best backup software in the world

Hi

I am looking for a backup tool implementing the best out of duplicity and rsnapshot.

Duplicity is the closest to what I need, but there is the drawback that you always have to choose between full and incremental.
Stacking incremental backups is dangerous, but full backup stores another full set of data, without reusing any bit of information even if the files didn't change.

rsnapshot is very efficient to this regard, since it uses filesystem hard links to link the same data as many times as necessary.
Therefore, backups are always incremental, and it is never required to store the same file version twice. However, it works only with a filesystem supporting hard links.

I am looking for a tool which would allow that, but without relying on the filesystem, to be able to backup to FTP, or any other destination where hard links are not an option.

I am aware that the tool will then have to implement a catalog of all files versions, and a reference counter to be able to free them when possible. Basically, re-implementing the filesystem feature...

Is there anything similar already, before I start yet another backup tool? :)
.

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