Avalon Eidolon powered by ARC Ref 600's? This has got to sound incredible, I have experience with both products and they are on my "top" list of components, sound wise.
Are you looking for change, just for change? Or do you have issues with the sound?
I ask because MIT cables definitely have bass "from hell," and a good choice to flush out the bottom end of the Avalon's but wonder if they are right for the high frequencies considering the other components.