Which is more important - Interconnects or PCs?

Interconnects and speaker cables are much more important than power cords.
Jay

That question is too open ended.It all depends on the paricular system your builiding it upon.Whats the source?The speakers?The Preamp?The amp? If your using a turntable Whats the tonearm? The cartridge? The room setup? You need to address all of these varibles first,before I can answer this general question.

Speaker cables, interconnects, then power cables.

"Is $5000 powercord really necessary?" Of course not, unless you really enjoy being someone's fool. If it were the case that dedicated lines cost this much (instead of 1/10th, as they do) I would be willing to say yes. The difference in this respect is indeed dramatic. But power cords - no way.

Interconnects and speaker cables, that is a different story. These have made a big difference for me. But there is no exact relationship price and quality of match in a given system. It is still easy to be a fool unless you know your own mind and trust your own ears. And personally, I would never spend anything close to $5k on a single cable or wire.

I'd would agree with Rd. I would only add digital coaxial cables after the power cables. So:

Speaker wire > interconnects > power cables > digital coaxial cable