You didn't really mention this but...are you already using an outboard DAC for your ARC CD3? If not, the addition of a good outboard DAC is going to make a lot more difference in the sound profile than changing the power cord. (And no, I'm not a PC naysayer; I've got my share of aftermarket PCs.)
Power cord choice?
Hoping to change (or upgrade) my current PC in use with my ARC CD3 Mk2. Currently I'm using a Locus Designs Polestar and setting a limit $600 max. I'd like to find a cord that can get more micro details from the ARC yet, I'd like to retain the smoothness but, try to open the sound stage and get a little more bottom in doing so. I listen to Alt rock (Sir Sly, The Killers, Gargage), rock, blues using Classe CAP 151 integrated and Apogee Slant 6s. I know this is subjective but, I'm also doing my best to work with my budget constraints and I'm not going to change if the improvement would just be slightly incremental. I'd like suggestions to consider, please.