which is better replacement for xmlDataDocument, xmldocument or xpathnavigator

Hi,

Have to clean up the obsoletes in my project. one of the Obsolete is XmlDataDocument. I have to make a choice between XmlDocument and XmlPath Navigator. 

Changing XmlDataDocument to XmlDocument doesn't require any further changes of code while  XmlPath Navigator requires few more tweaks.

I tried with both the options and it works as expected. WHich one to chose?