For 1 Corinthians, Mike says that the standard commentary is by Gordon Fee in the New International Commentary on the New Testament (NICNT) series. John Calvin’s commentary is also splendid as is that of Richard Hays in the Interpretation series. Nate would recommend the volume on 1st Corinthians in the Tyndale New Testament Commentary series by Thomas Schreiner, as well as Ben Witherington’s A Week in the Life of Corinth for an imaginative take on the background of 1st century Corinth. Other helpful books include D. A. Carson’s The Cross and Christian Ministry, Richard Gaffin’s Resurrection and Redemption, and Alistair May’s The Body Is For the Lord.