This album is really incredibly awesome.
Death to the World was my vote. But I also consider Phantom Antichrist, United in Hate (I SO want them to play this one live! Would go incredibly well with an eager audience!), and though in a slower, sentimental vein, Your Heaven, My Hell (on repeat right now, listening to it with headphones) is just an amazing, even beautiful true metal song.
The favorite on this thread so far is amazing with so many changes and uber fast sections (Civilization Collapse), but if my dream was to come true, the 3 songs I wish for them to play live when they come to NYC are undoubtedly Phantom Antichrist, Death to the World, and United in Hate. Your Heaven, my Hell would be a nice, fourth bonus. ;)