This is a pretty killer tune, man. Those vocals sound so hard to do, but he pulled it off. I'd change that intro to only play on it's own once. I like the sound of the guitars. The OHs on the drums seem to be getting away from you a little. I'd try a little EQ just to take the extreme highs out of there and compress them if you're not already. Not much kick and bass. There's a thread here in the forums, started by Chris_P_Critter that goes over a lot of metal production tips. You'd probably really dig that. This is a cool track man, if you go any further with it, please post updates. Check out that metal thread!