I've used both of the Synergistic cords Master Coupler and the Ref.They are ok, however are a bit too brite for my taste.I've had VT1 and VT2 and now VT3 and prefer the BMI Whale.I've also tried the Viper2,although quite good,a bit too foward of a presintation.Give the Whale a shot,you'll be glad you did.