we have an existing plone / zope system for content mgmt of our training portal

we are adding new features to it and trying to evaluate whether we should use jboss and jbms for it

we do not want to touch the current system of plone / zope

what is the best solution ? should we remove it completely or should we also have jboss and build a connected

what advantages do you think jbozz have over plone and zope

Is it really worthwhile to change ?