I'm guessing that you have the budget for a single good cord and want to put it where it will do the most good. You can certainly have fun swapping around, and draw your own conclusions, but IMHO Nrchy is on the money. With this particular upgrade, the most improvement in my system came when I put a high-end power cord on the digital source. (With transport and converter separates, the DAC is usually the place to put the cord, but in one of my setups the opposite was true.) The preamp comes next in priority after the source. Changing the cord on other components may have a less noticeable effect.
