Better get some expert advice on this. A doc mgmnt system is a strategic tool and its selection and implementation is a major task that can have long reaching impact. In most implementations, extensive customization is a necessity increasing the cost of the solution.
I know of a company that went for an OSS (open source software) product (blinded by the apparently low price) and they got into serious trouble pretty fast!
Treat this as a high-risk, major project if not ...
