To sort this out, if you think the sound is "lean" with the Cary/Whest combo, the "problem" probably won't be cured by introduction of the Spectron, but I could be very wrong. I used to think based on listening experiences that Class D amps were by definition "lean", but recent reports suggest that maybe the latest circuits (which I have not heard) have been designed to sound more like tubes than do conventional solid state devices. Ergo you might be pleasantly surprised by the change when you introduce the Spectron. I would not make a move until you get the Spectron and have had a chance to live with it and the Whest in the same system.