Technical assistance and recommendations needed

I forgot to mention married guy sooo room full of hanging and standing plants in the corners so they're my bass traps, also drapes behind the gear covering windows. it is a very well damped room.

The speakers are 8 feet apart and 8 ft from sitting position and  5 ft from side walls. 2 ft out from back wall but back side of speak only about 12 inches or so from back wall, consequently DOF not great but imaging is very good as good as recorded. It just needs a touch more tenor tone( a bit more body to the sound) for lack of a better word. Don't get me wrong it sounds very good on axis. 

 a bit more body to the sound

So with the WAF we will forget about adding diffusors on the side walls or the ceiling. I found the Add-Powr products unlike other power or cable related upgrades in that they add more harmonics and decrease the noise floor. Noise you didn't even know existed but recognize once its gone. You can check it out here:

https://add-powr.com/technology

As said Canton’s are bright

yes indeed

+1 for the Cardas speaker cables. You can buy the 4s11 in bulk and do your own pretty easily. No cable is an equalizer, but proper mating can really make a difference. My Klipsch Heritage speakers have all benefited from a Cardas cable of some sort over the years. Bang for buck comes to mind. Enjoy your system and get lost in the music.

I hate to burst your bubble but the aluminum tweeters in those speakers might be the problem that you are describing. I doubt that any IC will warm them up!!