Unless you have excessive or unusual noise I wouldn't use a pc, my suggestion is to go with quality aftermarket cords like BMI here at audiogon if possible. Also critical are dedicated lines for all your equipment - that can make a huge difference.
Power Line Conditioners
I am fairly uneducated to the power conditions although I currently use a Panamax 1000+ in my system. Do all components need to go through the unit or simply the amps. I like the PS 300 but it only has 4 outlets. Please help me understand this subject better if you have the time. Thank you. Rick