I partly disagree. I agree Rom 7 is describing a man after he is saved but it also is a honest description of a man that truly understands grace and by that understanding it gives him a true understanding of himself.
Think that Paul was showing to us that even getting saved by Grace of God does not mean that we automatically will be able to live for Him, as paul tried in his flesh to do that, and needed to rely fully upon the Holy Spirit in order to do that!