I have tried a few Synergistic Research products (ICs, a power cord, a PowerCell 6 power conditioner) and found them to create a slightly "hyper" sound signature that became fatiguing for me over long listening sessions. They are great if you want increased dynamics, but if your system is already high resolution, they only will make it more so.
I use Gabriel Gold Revelations and Raptures IC's throughout my system. I greatly prefer them to Synergistic Research ICs. Presentation is just more natural and extended.
So, some "gold based" fans like myself first tried Synergistic Research. However, you might not know it as writing anything negative about SR seems to be verboten.