Ride the Lightning is a good album......before they all got their hair cuts. Man that made me laugh my hole out.
Nothing wrong with Master of Puppets either 
I also really dig Death Magnetic and S and M 
Death Magnetic is a great album, they seem to have sorted thier shit out after st. anger.
I have the cd and dvd of S&M awesome album, great to see most of the orchestra members getting right into it and enjoying themselves.
