Weakest link in my system

OP,

 

From what you said Wilson Alexx sounds like a good choice.

Not sure if you’ve tried decoupling the preamp and CD player from the maple. As an experiment, try a set of Nobsound springs instead of the feet. 3 or 4 under the chassis. $30. I have found it opens up the soundstage with enhanced spacial depth and further detachment from the speakers. Adjust number of springs in each unit for 30-50% compression. 

Frame of mind when listening, perceptions and of course psychoacoustics.  

You have to ask Anne Robinson or Jane Lynch.

Perhaps it comes down to what’s missing for you. That usually leads me to the next upgrade. what more you would like, more warmth, detail, sound stage, layering, extension upper or lower, etc. I know the ARC equipment plays very well with Magnepan 20.7s. Note Maggies are a personnel preference