Your recommendations?

Someone I know is soliciting recommendations for textbooks suitable for an undergraduate course in ecclesiology (Theology of the Church). Although a few books come to mind, this isn't my field, so I solicit the suggestions of any of you who might have some good titles to offer. Relevant criteria, besides readability for undergraduate students, would include orthodoxy, clarity of arguments, etc.

So far, the list of possibilities includes:

• Henri de Lubac, Splendor of the Church

• Hans Urs Von Balthasar, Office of Peter and the Structure of the Church

• Avery Dulles, Models of the Church

• Joseph Cardinal Ratzinger, The Ratzinger Report

• Edward Schillebeeckx, Christ the Sacrament of the Encounter with God

Are any of these too difficult? Inappropriate? Any better suggestions? Your thoughts?