Which power cord more important?

All of the above advice, I think, is valid. The only thing I would ad is that power cords do not always make a better difference; a lot of times they do more harm than good. Also, when picking between one of your two components to do the cable upgrade, I would go with what ever component is weakest from a design standpoint. For example, if you have mass market sony or denon universal player and a roland or ayre int amp, the source would be the weaker component by design and would get the cable. The amp in this case would already have some power conditioning built into the product so the need would be not as great. It is a vague example based on the variety of the components out there but I think you can get the basic idea what I mean

Marakanetz,

I knew that statement was going to come back to me the moment I hit the enter key. Your way makes complete sense but like everything in audio, I find there are always a few exceptions. The only reason that I threw that comment in was to imply that you need to be careful because you don't always see the problems that can occur when you upgrade your system. It can be very frustrating. For example, I wanted to try sacd a few years ago so I went and bought a sony dvd/sacd player. I think it was a 9000es. I really don't like the term high/low end with regards to audio equipment for several reasons. For lack of a better term, though, I would say the sony was the "lowest end or weak component" in this system, compared to the others. After a few days I was wondering why my system just did not sound right. To make a long story short; when I unplugged the sony, my system sounded normal again. Apparently the power supply was not designed that well and was letting a lot of noise escape back into the system. The fix was a jps PC with a filter made just for that and a small power strip that isolated the component. Not a problem that you see all the time, but a frustrating one. Also, some components, like my ayre v 5's do not like other power cords. I have tried at least 5 or 6 different brands and the stock cord always sounds better. I hope this info is more clear (and useful).