That's metal!
Oh man, this sounds so awesome! I am listening to it through headphones, and it's a lot clearer than some of your other work. The riffs and drums are awesome too! I am not just sucking up to you man, this is one of the coolest things I have heard out of you yet! I can't wait to hear it with vocals when you can!
The only thing I would suggest though, is that you should add some more heavy riffage after the solo for a little while. Something different for you to sing over. Almost like a heavy interlude/breakdown, just at the end of the song. But that's just my opinion. Yeah man, awesome work!