Hmm I have heard the Klispch Cornwall IV (La Scalia too) on the 7200 and 8900 and neither impressed me. The combination seemed a little dull. After about an hour demo on the Cornwall IV I need a full day break from music, my ears were that tired. I demoed them at 90+ DB but I often do that with my own rig. Lower end Mac would be pass for me.
now before you call me a hater I own a McIntosh MC462 which is my favorite amp to date. I also own a pair of Klipsch 8000f which I used for surrounds. I thought they played pretty well on the MC462 when I was breaking them in. The bass on the 8000f is not very textured other than that they sound ok to me for the $1000 I paid.
I don’t think the lesser model macs will clean up your sound. The truth in the Heritage family of speakers is just fatiguing at high volumes imo.