The Armageddon cabinet is solid. I've used it with Bogner, Diezel, Splawn, Marshall, and Armageddon heads but it sounded best (imho) with a Peavy 6505+ and was just MAMMOTH. It unleashed the full rage of the 6505+ and yet tamed it like no other cabe I've owned.
I chose it over an ENGL 4x12 and it holds its own against Marshall, Splawn, and Bogner cabs. Something about the speaker mix just seems to work well.
I ended up keeping the cab and sold the Peavey, but it absolutely compliments the Armageddon head (huge sound, cuts the mix w/ no harshness, and a tight yet chunky bottom end)....however, I'm needing power tubes so haven't played that rig in a while.