Very nice system you have there. Seems like you put a lot of thought into your choice of components to arrive at the sound you're looking for.
Just messing with you about the Kegerator. I use a Signal Cable Magic power cord myself. It was a nice audible improvement over the stock cord. As a matter of fact, I use Signal Cable throughout my entire 2-channel system with great results. When you save up a little more scratch, give their speaker cables a try. They are very inexpensive and sound excellent. I have tried the high dollar cables and the Signal Cables hold their own against them.
What type of beer was in the Kegerator when you burned in the power cable? I understand that light beer is best when burning in cords with a Kegerator. It tightens the bass and gives you much more air in the midrange.