Great pair PB, you should see the rest. 
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-I'm not sure BTW that changing just one cable in isolation is 'necessarily' going to be any great shakes. Perhaps when the whole 'network' is rewired, differences/improvements 'maybe' more apparent.
-universal statements of fact should be avoided.
->£500 (for the sake of arguing) i/c , power cord, speaker cable is not 'high-end' in the context of hi-fi.
continue........