Currently I use a BackupPC system on the LAN to do nightly backups of all my systems. My mac mini is backed up automatically via Time Machine as well, and I do

Currently I use a BackupPC system on the LAN to do nightly backups of all my systems. My mac mini is backed up automatically via Time Machine as well, and I do a nightly backup of the MacBook with SuperDuper. Setup of rsyncd on the one windows laptop is a bit of a pain, but it works well. My current concern is off-site backups. I have none, and need something. The problem is that I can't backup the BackupPC pool (~700G of backups) and since I'm horrible about determining what to save and throw away I end up keeping everything. I think I'm hosed :)