As a sidenote, on Pierre's spinorama website, each speaker measurement has a link that says "data". I'd argue that any tonality score over a 7.0 with a "perfect subwoofer" can be considered an endgame purchase. You might still need to tweak the room or go bigger to fill a bigger room, but you can be confident that it's dangerously close to being the best that can be done.

Author of "Status 101: How To Keep Up In A World That Keeps Score While Buying Into Buying Less"