@milpai yes 100% system dependent. Yes give AQ a shot. I would bypass Thunder and start with Tornado or Hurricane. Be careful buying AQ on a used market. Too many fakes.
@audphile1, I intended to go with either Tornado OR Hurricane source for the DAC. Thanks for the advice on used market.
@fthompson251 , my dealer carries AQ. But I did read very good reviews about them.
@jayctoy , Thanks for the advice - will keep that handy. BTW, what was your previous power cord and how did the Tornado improve on it? I am guessing that you are using the "source" version on the Ruby and "variable" on the Plinius?
One approach is to use the best possible power cord on the Power Conditioner, because that is the one that provides current to all components. If I like Tornado, I might be willing to pend a bit on the Hurricane for the conditioner.