[RndTbl] Tape Backup Software, comments.

I am looking for Linux tape back-up software for a small network of mixed OS PC's. I have looked at Amanada, Arkeia, and Tolis BRU. I am especially looking for support for HP "One Button Disaster Recovery" (OBDR), and centralized network backup. I have followed the Amanda mailing list and have feel for it's use. Are there any pros/cons to Arkeia and BRU ?