You seem to be most closely aligned with the Fuller Meaning, Single Goal view, a view defended by Peter Enns in the book “Three Views on the New Testament Use of the Old Testament” (edited by Kenneth Berding and Jonathan Lunde, Nov. 2008). Since the NT writers held a single-minded conviction that the Scriptures point to and are fulfilled in Christ, this view suggests that the NT writers perceive this meaning in OT texts, even when their OT authors did not have that meaning in mind when they wrote. It should be noted, however, that advocates of this view are careful not to deny the importance of the grammatical-historical study of the OT text so as to understand the OT authors on their own terms. For more info, see the book, or attend a special session devoted to the topic at the ETS Annual Meeting in Providence, RI (Nov. 2008); Walter C. Kaiser Jr., Darrell L. Bock, and Peter Enns will all present their views.