That's what I have been listening too lately and has an awesome starting riff. Most songs in that record do but this particular one is just too awesome.
"Override of the Overture" - Dismember (my top pick for now) "The Swarm" - At the Gates "Suicide Nation" - At the Gates "Bleed" - Meshuggah (even though it is also the main riff) And that Dark Tranquillity song that MGH beat me too.
The album "Nocturnal" by TBDM has some the nastiest, heaviest death metal openers ever. Something about the "bounciness" of the riffs on this album just get me going. Plus dat tooone.