Cornwall IV or La Scala vs the big boys

LaScalas are very lively horn loudspeakers. The type of sound all movie houses had back in the 60s. I don't think they are comparable to the loudspeakers you listed.

Very different from the other speakers that you mention, and probably better than some of those dynamically, and not as well balanced or extended in other ways.

I moved from some highly modded Lascala's to Spendor D9.2 ($16,600 canadian) recently.

Spendors; more balance overall, slightly more detail level (especially up top) and of course deeper bass and a more delineated and separate sound stage. easier to integrate into a room, easier to add subs. 

LaScala; dynamics second to none, immediacy, "you're at the event" feel i.e., Room filling live feeling. speed especially in the bass response maybe not as deep but more detailed. feels more alive in room then others. harder to integrate the drivers for time alignment. harder to integrate in a room, harder to integrate subs. 

MAGICO M6 will blow away Cornwall.