Have you read Douglas Harink's Paul Among the Postliberals? If not, I highly recommend it.
Harink engages major sections of Pauline thought and post-Protestant interpretations relying heavily on Barth and those who have come after and been heavily influenced by him, or influenced by those who have been influenced by him. There is a lot of Barth, Hauerwas, Yoder, J. Louis Martyn, and John Milbank in here,
I love Hauerwas and co. but too often he glosses over the scriptures or just doesn't interact with them as much as I would like in his works. Harink's book does a good job of entering the scriptures heavily into the discussion.