Power Cable Suggestions - Budget

I've read many times about the difference a power cable upgrade can make. I looked at some of the power cables that came with my amp, preamp, CDP, etc. and they do seem very cheap so thinking about buying some cables. I have Bryston pre and amp. Was thinking of maybe the 14 gauge Pangea or similar then I realized I am plugging into a power strip whose cable is likely junk and will need an upgrade here too (maybe 6 outlets). So in summary, I need a couple cables and a power strip that might result in the improvement that some of you claim. Thinking of keeping it in the 3-400 dollar range for all.