Configuration File Mgmt software tools

I’m looking for feature-to-feature comparisons or detailed information on products that manage UNIX/Linux server configuration files. Features that I am interested in include revision control, roll-back, change management and disaster recovery support.
I’ve been asked to look at BMC, Tivoli and Computer Associates among other. Has anyone done such a search or comparison recently? Do you have information you can share with me?
Thanks.