The Zondervan Exegetical Commentary on the New Testament is an exceptional series. I picked up James a couple of years ago and was blown over by it. This series is helpful for those who, like me, have had Greek in seminary, know the importance of the original languages, but through the busyness of ministry have neglected to keep it up. The ZECNT serves as a kind of prompt to help you remember what you studied and ease back into using Greek.
But it does more than that. It offers great exegetical insights into the text. Unlike other exegetical commentaries, it does not overwhelm you with interaction from other critical sources. You don't read page after page of interaction with other commentaries and monographs. That is not to say this series ignores other material. It simply keeps the focus on the Greek text. For this reason, I can't recommend this series highly enough.
Zondervan recently sent me a copy of the newly released Ephesians commentary. I plan on preaching through Ephesians in 2011 and this will be a much used resource. Thumbing through it I can already see this will be a helpful resource to enrich my study and sermon preparation.
This may be one of the best new commentary series available. Even though it deals with the Greek text, those with little to no Greek backgrounds will benefit from it greatly.