I have begun working my way through an exposition of 1 Corinthians and a few people have asked me for recommendations for resources to help study through the book. This is a great idea and will certainly help you get the most out of the Sunday preaching. The top few resources that I think would be especially helpful for the church are as follows:
Roy E. Ciampa and Brian S. Rosner have produced what may be the best overall commentary on 1 Corinthians in print in English today. It is a bit on the technical side so it may be more challenging than the average person in the church is looking for. But if you are looking for a thorough commentary that will deal with the Greek text, this should be your first stop. Even if you are not a Greek speaker, the references to Greek are largely reserved to the footnotes so it will still be accessible for the motivated student of the Bible. Ciampa and Rosner do a great job of understanding the argument of 1 Corinthians and they show how it is steeped in the theology of the OT.
One of the best commentary series now out for the layman is the EP Study Commentary Series. They wed top-notch scholarship with genuine evangelical faith and they make it accessible for the laymen while still valuable for the pastor. They are great for a family resource to have on the shelf. One of the volumes in this series is Peter Naylor’s commentary on 1 Corinthians. Naylor does a good job of bringing clarity to some tough-to-understand topics in the book. You may not agree with everything you read but he will definitely be a help to someone who wants to really dig in deep into 1 Corinthians.
It is always good to read authors outside of our own generation. A classic commentary on 1 Corinthians was written by Charles Hodge and is currently included in the Geneva commentary series. Hodge taught biblical and systematic theology for more than 50 years at Princeton Theological Seminary. He is sound and wise and a good conversation partner for this letter of Paul.