In fact, I'm the fan of Acronis. Beautiful interface and stable features are my favorites.
But here, for SBS server backup programs. I have to say I prefer ToDo Backup.
Firstly, I've checked todo backup server version under sbs 2008. Everything goes well, including the system backup and restore, file backup and restore, system based hdd cloning, incremental backup, universal restore, snapshot... I checked all these features and made a comparison between these two, I found there is almost the same pretty good backup programs here.
Everybody knows True Image sells seperately, and the price is always higher than others, but todo backup is an all-in-one program with a cheaper price.
Based the same feature undergroud, the price would be important for sbs servers.
So here, ToDo Backup is better than sbs server users.
You may find here:
http://www.todo-backup.com/business/server-backup.htm
http://www.acronis.com/backup-recovery/