I highly recommend looking at the Audio Quest Hurricane. Over the last couple years there has been a lot of buzz in the community around them. I had been trying to find the right power cord for my amps for nearly a year… being frustrated at each trial. Cardas of any caliber was a touch too warm and Transparent, WireWorld, DHLabs… etc. added some detail but lost some bass. Finally my dealer brought over a Hurricane, my search was over nearly instantly. They added detail, lowered the noise floor ever so slightly and added a bit of power to the bass without tipping the tonal balance at all. The best power cord I have ever heard. I suspect they are better for a number of reasons… one obvious one is incredibly tight fitting connectors.
A must try. Even if it is a bit above your price range… once you hear it, it may become inside your price range. It is that good.