Wow, they look good. They have changed a lot from the first album...
Trivium announced that their new album "Shogun" will be released in September, should be pretty intense...here is a song from the last album "The Crusade". They had much heavier screaming/metalcore vocals in the days of old on the "Ascendancy" album.
http://youtube.com/watch?v=Lp8p5OPtEe0