Excommunion

I, also, have Superion. Definitely an extremely heavy, fast and complex sounding album. They also did a crushing cover of Morbid Angel's God of Emptiness. In fact hearing them on that tribute comp is what got me interested in hearing more from them.
I'd like to see them live. You didn't perhaps record their set did you, Hannibal?
If you haven't already, check out the band Drawn and Quartered. Also a quality death metal project.