Though I've only recently been delving into the "super" PC cords, I would suggest one other candidate. The Coincident PC only retails for about 275, but is certainly in the league of those that you've mentioned. It isn't embarrassed going up against cords 2X or 3X the price. Regrettably, to really hear the wonder that is Shunyata, you have to go up to their Viper v.II /Cobra/King Cobra models, all significantly more money than you're contemplating. This isn't to say that the other models aren't worthy, just that there is a huge jump in performance when you get above a certain level. The same is true with the Synergistic line of PCs as well. If you can spend around 600 to 700, get the Shunyata Viper II or Cobra PCs. If you simply can't, then get the Coincident. Hope this helps more than confuses.
Power Snake Mamba vs. Synergistic Master
Anyone had a chance to compare the Mamba vs the Master Coupler head to head? Opinions?