Check out this band Xenocide, wicked stuff. Super groovey. Their other stuff they're working on isnt quite as groovey but is more interesting.
[VIDEO]http://www.youtube.com/watch?v=0-xwOSnDgvI]YouTube - ‪Forgotten Bloodlines and Empty Oaths (Final Mix) - Xenocide‬‏[/VIDEO]
For fans of Decapitated and Xenocide, check out one of the bands mentioned in the title that you already listen to?