Well, if you want to check out technical metal, the blueprint was forged by Cynic, Focus. That is required listening, if for no other reason than to hear the one record that influenced pretty much everyone that heard it. Seminal. You may want a change of underwear handy. Something made out of canvas, perhaps, something that can handle clay.
And, for some reason, I always associate Nile with Meshuggah. I could be out there, though.
Oh, and you should definitely check out Canvas Solaris. Go in blind on them, you'll be pleasantly surprised.