Class D and Power Cables

I just put a new pair of W4S Class D monoblocks in my system. So far, I'm very pleased with the result. Now that I know I'm going to listen to them for awhile, I'm starting to consider power cords. But, I started thinking. Does a power cord actually make a difference with these new digital Class D amps? Before I run out and spend a few hunderd on power cables, I was hopoing some of you fellow Agoners could give me some input/experiences. Thanks in advnace.