If you haven't seen it, you'll want to read this review of your amplifier, which describes several tweaks and tube changes that reduced the leanness they found it to possess, and also improved its imaging:
http://www.soundstage.com/revequip/pathos_classic_one.htm
Also, although I haven't heard it I suspect that the Doge 6 cdp ($1586), which has been commented on favorably by many audiophiles and is tube-based and contains an excellent dac, might add some of the richness you are looking for:
http://www.pacificvalve.us/DOGE6.html
Regards,
-- Al
http://www.soundstage.com/revequip/pathos_classic_one.htm
Also, although I haven't heard it I suspect that the Doge 6 cdp ($1586), which has been commented on favorably by many audiophiles and is tube-based and contains an excellent dac, might add some of the richness you are looking for:
http://www.pacificvalve.us/DOGE6.html
Regards,
-- Al