Searching For Perfect Configuration Management Tool?

PullingMyHairOut asks: "I work for a company that has recently acquired many smaller companies and is now in the process of integrating them. One of the problems we are facing is creating a unified Configuration Management Policy and locating CM tools to implement it. I am personally advocating CVS since, as a developer, I find it very useful and full featured. However, management would like a tool that can: easily be used by suits; supports access control lists on project folders with recursive attributes (top level readonly means all subfolders and files are readonly); supports versioning of documents (MS Word, HTML) as well source; and supports (but is not limited to) RCS-style file checkouts where only a single developer can have a file checked out. I'm pretty sure that using pre- and post-checkin scripts and wrapper programs around CVS (better than WinCVS) can make this work, but we don't have the time to write them. Does anybody know of a CM tool that can do all this? Even if it costs money?"