Beautiful, beautiful system Phil!!! Another 10yr Eidolon Diamond user here. I don't think I'll ever find another speaker that pulls it all together as a "whole" like the Eidolon Diamond. It always allows me to forget about the equipment and get lost in the music. I too also find that other changes up the chain are easily reflected.
Someone I know who's system I heard 4-5 times moved from the Diamond to the Isis, and IMO in his extremely well built room, which was professionally acoustically designed and measured, the Diamond got out of the way and left more music intact than the Isis.
Since you enjoy Avalon so much have you considered the Time or the Compas?
Meanwhile sit back and enjoy!!!
best,
Tom