i don't care about the room shaking for the earthquake, But the cannons on the 1812 i do
I don't know how deep in the frequency range the cannons dig (others familiar with this piece might comment) but you might consider M22s + sub as well. Agree, it's not a pure 2.0, it's a 2.1 but at least it will play lower than the M80s if need be.
Bruno M80s/VP180/QS8s/EP600/AVR-890 ------------------------------------ "The problem is choice..."