@ted_denney Ted, since you framed the question to cover all the products Synergistic Research sells, I can tell you that the Shunyata cables and power distribution devices I recently purchased made a significant SQ improvement over your cables and PowerCell device, especially for my dCS Rossini DAC/Streamer.
What makes the biggest difference in sound quality?
When making changes or adding things to your system, what makes the bigger difference in sound quality on preamp‘s and power amps? Interconnects, speaker cables, power cords, or fuses?