Java EE (Java Enterprise Edition) General Discussion

Hi, All,
In my appliaction, large number of XML files(conformed to given schema) to be created from Java objects and subsequently any of these XML files may be retrieved and parsed back into java objects. Along the way it would be nice to have tools to manage these xml files, such as version control, presentation tier rendering etc.
I googled a little and found these:
- Apache XMLBeans is a smiple way to parse XML to Java object
- Apache Velocity/Anakia for XML file publishing(JDOM based)
- Sonic XML content server
- MarkLogic XML content server

Anyone has comments on the tool listed here or some other tools I should use to do
XML<-->Java transformation and large number of XML files management?

Your help is greatly appreciated!

-Herbert