Power Cords

I am considering changing out my stock PCs. I don't want to spend a mint on them though. But I do think that upgrading to an adequate guage and having them in the correct lengths should be an upgrade for my system (MA 6500, Hydra 6, ML Vantages, Marantz BD 7003, Vidikron VL-52, and to come a Cambridge 840C).

I am considering Signal Cables, Zebra Cables, Pangea, PS Audio Jewels, and Element Cables. They are all around $50-$60 each and are within my price range. Also, I am considering just buying some Volex 17604s. They are less than $10 a piece and seem to be highly regarded.

Have any of you used these diffent PCs and can you comment on their sound? I've also thought of Shunyata Diamondbacks. But the cost is at least 2X as much.

Any comments or direction are appreciated.