I think that Metro04 does have a good point, the whole debate over power cord benefits, its length, gauge, & additional connections must be limited by the house wiring behind the walls. The old addage your system is only as good as its weakest link should apply.
In regards to house wiring, Romex 14/2 is used for lighting and 12/2 for other applications. So if 12 gauge is the limiting factor, to buy a power cord with a heavier gauge than 12 seems self defeating unless you have a dedicated line from your main service box to your stereo to support heavier gauged power cords. What I do know is that a quality power cord does make a clear audible difference, especially in digital amplification but again probably not always based on its gauge when you take into account the factors that may or may not exist within your walls.
