Unsound makes a good point, but I suspect that the Adcom is not quite up to the level of the other equipment you have. The Marantz integrateds with the HDAM module are good sounding, and I've found used Luxman or McIntosh power amps to be reliable and neutral.
Warm Replacement for Adcom GFA 545 II
I recently upgraded speaker cables and interconnects in my system and it revealed harshness of the Adcom. My system: JM Labs Daline 3.1, Jolida 5t (upgraded), Moon 100 d DAC, and Apple Airport wireless. Cables are Audioquest 8 cv and Audioquest Diamondback. The brass instruments became too harsh and fatiguing to listen to. I listen primarily to jazz, vocals and classical. I would also consider an integrated amp and replace the Jolida. I have no particular budget, but do not want to spend more than would make sense in the context of the overall system. Thanks very much for the advice.