I've never heard the cornwalls III's,but I've owned everyother heritage klipsch "except Belles",The chorus II's were great,better than the cornwall II's,"my opinion".The Klipschorn's are just a differant beast all together.I currently have a pair of cornwall I's,with Bob Crites type B crossovers,"rest is original".Later on Im going to update the woofers "bob Crites" and Im going to try and find a bigger midhorn,but keeping my k-55v's......I know a guy that builds speakers,and maybe he can build me a custom set???? If I had to choose only one speaker from klipsch it would be the cornwall's. If I had the $$$ to buy my dream speakers,I would have to say Jbl's or Volti's "made in maine" I heard a pair of Volti's,and I have to say.....I WAS BLOWN AWAY!!!