You should listen to Nachtmystium's CD Assassins: Black Meddle Pt. 1.
I've only just gotten it (from my Wife, who gives the best presents ever) and haven't really had enough time to digest all of the lyrics, so I'm not going to hold your hand when you go and turn Satanic. You're grown. That's on you.
But, if you like really heavy, smart, forward-thinking metal, I'd give this one a shot.
Lucky for me, they're playing in Memphis on the 27th at the Hi-Tone.