..we are just about to implement Symantec DLO (11d) for 150 clients after some product comparison. Why are you looking for better solution?
Comparison showed DLO as best against:
Acronis->block level backup means no single file restore (user initiated) possible. More of a system restore tool.
IBM Rescue and Recovery->deployment engeneering to costly (time vs reliability)+ complicated for users
Retrospect-> had some issues during test but otherwise straighforward and promising
Brightstore Arcserve Backup-> Really good tool and met all our expectations, though must say not as straihtforward to administer as DLO.
Symantec DLO was our choice over Arcserve because we already use Symantec for the servers and the DLO intergrates into existing server so extra server needed.
Hope this helps you.
"I have made this letter longer than usual, only because I have not had time to make it shorter." Blaise Pascal (1623-62)