I don't go out of my way to buy heavier power cords, per se. I did buy an eight foot granite audio power cord a while back for the simple reason that I did not want to use an extension cord. I use it on my CD player and I do believe I can hear a differance. As I have over the years collected a surplus of power cords, I do use the heavier gauge cords and and I store the lighter ones in a box. Again, keeping in mind that your question was simply one of heaver gauge cords. You did not ask about all of the specialized high-end cords available.
One interesting thing you can do is replace the cheap two wire cords that come with many DVD and Cd players with a used computer cord that has some shielding which is available at any used computer store. It can't hurt, and it might make you feel better.
One interesting thing you can do is replace the cheap two wire cords that come with many DVD and Cd players with a used computer cord that has some shielding which is available at any used computer store. It can't hurt, and it might make you feel better.