I still find even RRS pretty expensive to handle my backup needs. It probably still has excessive redundancy and too fast IO. I run a family server to backup me

I still find even RRS pretty expensive to handle my backup needs. It probably still has excessive redundancy and too fast IO. I run a family server to backup media and documents. The data there is already a consolidated/versioned backup of other locations put on a RAID5 array. With these two levels of redundancy already in place all I want is a cheap per GB storage online I can rsync to. With only photographs/video/music collections of 4 people I've filled 1TB very fast and will have to swap bigger drives in very shortly. To backup even 1TB in RRS means 1200$ a year. With that money I can just buy a second server, put it on an existing commercial DSL connection somewhere else and run a daily rsync. Anyone know of any solution like tarsnap/rsync.net that is an order of magnitude cheaper? Most of the backup services require proprietary clients that I hesitate to rely on, and I doubt their "unlimited storage" claims aren't just like "unlimited bandwidth" claims.