DR KAY: If like me you can tell that a good quality hdmi cable make's a difference in sound and picture quality then i would go for the CHORD SUPERSHIELD, it's a top notch, whf 5 star rated cable and it does make a hell of a diffirence compared with cheaper rival's. Trust me you will not be dissapointed, i know i wasn't. There was once a time when i thought that expensive cable's were a rip off and could not make a difference to sound or picture quality but how wrong i was and i can testify that they indeed do make a difference.
I've got Chord Supershield HDMI, along with a freebie Sky cable, a £40 QED Performance HDMI cable & a £4.79 ThatCable HDMI - Absolutely no difference whatsoever between them (including the freebie Sky cable), either in picture quality or in audio quality.
With audio, some cables make the sound 'louder' in my experience, but if you compare all cables at a equal sound level (not the same volume knob level, but the same sound level that your ears perceive), then there's no difference whatsoever. According to forum member idc (who has even made cables himself & posted the details in the "accessories" section), every cable has a 'sweet spot' in sound which are at different volume levels.