If anyone really feels the need to read Wright's or Dunn's (Word Biblical Commentary), please for the sake of truth compare it with Murray's commentary (or some other reliable commentary) so the errors may be recognized and dealt with quickly.
RTS offers a class specifically on this issue and here is their reading list for a more thorough examination:
Required readings will include:
N. T. Wright, What St. Paul Really Said (Eerdmans, 1997)
Guy Prentiss Waters, Justification and the New Perspectives on Paul (P&R, 2004)
James D.G. Dunn, Christian Liberty: A New Testament Perspective (Eerdmans, 1993)
"New Perspective" Commentaries:
N.T. Wright, in New Interpreter's Bible, Vol. 10 (Abingdon, 2002)
J.D.G. Dunn (Word Biblical Commentary, 2 vols.; 1988)
Luke Timothy Johnson, Reading Romans (Smyth & Helwys, 2001)
Krister Stendahl, Final Account: Paul's Letter to the Romans (Fortress, 1995)
Non- or Pre-"New Perspective" Commentaries:
John Murray (New International Commentary on the NT, 1968)
C.E.B. Cranfield (either the original International Critical Commentary in 2 vols. [1975, 1979] or the single volume abridgment published by Eerdmans, 1986)
Douglas Moo (New International Commentary on the NT, 1996)
Thomas Schreiner (Baker Exegetical Commentary on the NT, 1998)
"Of Interest" -- Important Monographs or Collections:
Karl Donfried (ed.), The Romans Debate, rev. & expanded ed. (Hendrickson, 1977, 1991)
Philip Esler, Conflict and Identity in Romans: The Social Setting of Paul's Letter (Fortress, 2003)
Richard Hays, Echoes of Scripture in the Letters of Paul (Yale, 1989)
Peter Stuhlmacher, Revisiting Paul's Doctrine of Justification: A Challenge to the New Perspective (IVP, 2001)
Stephen Westerholm, Perspectives Old and New on Paul: The "Lutheran" Paul and His Critics (Eerdmans, 2004)
N.T. Wright, The Climax of the Covenant: Christ and the Law in Pauline Theology (Fortress, 1991, 1993)
IMO though many can save allot of time, effort, and money by reading the article
The Great Exchange which I believe someone else already linked.
