First of all, what other people hear in their system, may not be what you hear in your system. We manufacturer audio components. Our listening room has over 30 pieces of equipment along with 4 different speakers. We have repaired and upgraded more components than most people hear can even think of.
For lower priced digital cables go with the Audio Envy or the Kimber D60. Up the scale look for a used Marigo Labs, Jorma or Cerious Technologies. These seemed to work well in all of our systems.
Happy Listening.