yeah, destroy the runner is pretty good. i went to one of their concerts in dallas (when i was in america visiting) and they were pretty good. Another REALLY good one is Zao, which isn't exactly like Demon hunter (the singing's alot different) but its still really, really good.
Also, becoming the archetype is pretty cool as well. There is also this one band i heard about in my school that is called Day of the Tribulation. It's also a christian metal band, but i've never heard any of their work.