I'd hazard a guess that most manufacturers don't make aftermarket powercords because they know high-end PC's are a big con. As for "offending" other manufacturers... what have you been smoking?
To answer the original question; any wiring within a component is very short and well shielded from external interference by the component casing. It wouldn't be prohibitively expensive to use silver for such short lengths as someone suggested above; such wire is obviously deemed unnecessary over good copper.
However, if we choose to mix brands in our setup and have varying distances between components, it does make sense to buy high quality shielded cables to get the signal from point A to B as pristine as possible.
I posed a similar question a while back, asking if eliminating interconnects altogether by using fully integrated systems (like the Arcam CD/Pre/power) was an advantage.
To answer the original question; any wiring within a component is very short and well shielded from external interference by the component casing. It wouldn't be prohibitively expensive to use silver for such short lengths as someone suggested above; such wire is obviously deemed unnecessary over good copper.
However, if we choose to mix brands in our setup and have varying distances between components, it does make sense to buy high quality shielded cables to get the signal from point A to B as pristine as possible.
I posed a similar question a while back, asking if eliminating interconnects altogether by using fully integrated systems (like the Arcam CD/Pre/power) was an advantage.