I was weaned on the writings of the members of the original faculty of Westminster Theological Seminary in Philadelphia, PA. The older I get, the more I realize how much I especially owe to the work of the late Professor John Murray. Murray served as the professor of systematic theology at Westminster Theological Seminary from 1930-1966. Among his published works that I have found most helpful are his essays, articles, chapters and sermons in the Collected Writings of John Murray, Redemption Accomplished and Applied, Principles of Conduct (esp. the appendices), his commentary on Romans, and his book on Divorce.
Recently, Westminster Seminary Press published a volume of sermons that Professor Murray preached, titled, O Death, Where is Thy Sting? This work includes a number of sermons that Murray preached on various portions of Romans, as well as several other individual texts. The audio from the last five chapters are available below: