Extreme Metal

[Maddolis]

Maddo I like Devildriver think there pretty leet they are classed on wiki as Groove Metal and Melotic Death Metal, I havent heard much Groove Metal I have alot of music so dunno who is "Groove metal" so can u tell me sum good bands that are I have like over 40 gb of tunes backed up on DVD's and currentley filling my Mp4 player and wanting Heavy Metal and Heavier music on it   

Probably best for Carcass or HaZe to answer that one, when I think groove metal my mind instantly goes to Pantera then kind of shuts down.
http://en.wikipedia.org/wiki/List_of_groove_metal_bands
There's a list of a few, I don't like a few of those and it's not really my type of thing so someone more into the groove metal/modern American metal scene would give you a decent answer.