Seeking good commentary on the epistles

I’m looking for a good commentary on the epistles. There are so many commentaries on the market that it’s hard to sort the wheat from the chaff, so I’m hoping on some solid recommendations from you good folks. This commentary will be for a Jr. High student to using during Sr. High years (and possibly beyond), so something with some depth without getting bogged down in technical details would be ideal. (I’ll trust your judgment on that.) Thanks for your help with this!

 - Ed