I have suggested to someone before to look at the Graphisoft website for Archicad demos, to put over a concept similar to Revit. For whatever reason, they typically put out great videos: I assume they are still as good as they were last year, have not looked. Of course, tell him you are advocating Revit, but the demos are to show the idea of a parametric modeler, as opposed to what you have now.
You might get a reseller to put on a demo for you, as well.
Bob
PS -- no one please say I hate Revit (have heard it before, not true). My idea is to get the change to parametric across as a concept, THEN zero in on Revit.