I have tried many times to rate the Priest albums or put them in order of how much I like them, but I really can't.  I love them all too much and they all convey such different moods and emotions and express different things artistically that comparing any two Priest album is somewhat like apples to oranges to me.  So I will tell you that the albums that got me into Judas Priest and the ones that are the reasons why I love the band so much are Stained Class, Sin After Sin, Sad Wings of Destiny, Defenders of the Faith, and Screaming for Vengeance.  Perhaps the one thing I owe my Fanaticism the most to, however, is the Live Vengeance '82 dvd that has kicked my ass over and over again since I bought it, and inspired me to get all the Priest albums.