I own all Synergistic Research power products and cables and they work very well as an entire system. I think this may be true for Shunyata products as well, but I don't have the experience with their latest products. I doubt you would go wrong with either brand, but my suggestion is to go all in with one or the other.
Some SR owners have recently had an issue with the aggressive marketing where new improved products are introduced with great frequency and which tends to prematurely depreciate their current models by 50%+ in the first 12 to 18 months of ownership, so this may be a concern if you are thinking of buying brand new.
Some SR owners have recently had an issue with the aggressive marketing where new improved products are introduced with great frequency and which tends to prematurely depreciate their current models by 50%+ in the first 12 to 18 months of ownership, so this may be a concern if you are thinking of buying brand new.