I love having Lenski's New Testament Commentary on Logos, but I would like to suggest something else that Lenski wrote.
I have Lenski's Eisenach Pericope series for the Old Testament, Epistles and Gospels - as well as his Ancient Church Pericope series for the Gospel.
These books are old and falling apart, but they are excellent. I enjoy them far more than his New Testament Commentary set because in these series he gives great devotional ideas for sermons.
Just a suggestion that I would definitely purchase into.