“I am truly surprised there is anyone suggesting this is the place where a $50 - $100 cable is the appropriate choice. ”
Nothing to be surprised here, just check out the audio system of folks recommending $1 - $2 per foot. Most folks recommending these cables never mentioned their components nor their system listed here. Your system should allow you to hear differences between the cables, no matter what price point / brand you choose to go within your budget. For the kicks, try a short pair of Mogami/Belden/BlueJeans etc etc and compare it with Audio Envy, Zavfino, Audio Sensibility or Neotech. You will know what to do next :-)