by Metropolitan Kallistos of Diokleia
Here are a few resources for reading the commentaries of the Fathers of the Church.
http://www.newadvent.org
Has the Nicene Post Nicene Fathers other known as the NPNF. You can get this in book form also.
http://www.ccel.org/fathers.
This website has similar information.
InterVarcity Press
A series of commentaries called the Ancient Christian Commentaries. These are good to read.
http://www.amazon.com/Saint-
Here is a link to many homilies of St. John Chrysostom.
There is of course the standard commentary from the Blessed Theophylact on the Gospels - You can find Theophylact's commentaries here along with other commentaries.