Edit - My pre-amp is a GTP-500II, and Speakers are Aerial 5's
A used Denon 5800 would tear up your Adcom separates. I have seen this Denon sell on A'gon for $800 and bought one as a gift. I could not believe the sonic performance! As an owner of old Adcom separates, I know they are not even close to this Denon. And when you imagine the need for no ICs here, it is an even better value.