Balanced or RCA?


For 1.5 metre cable between ARC LS-25 and Bryston 7B STs would it be better to get a balanced cable or use a plain RCA cable? I am no believer in magic cables, so what I am now looking at getting is a pair of Kimber Hero balanced 1.5 metre.
pbb
Cheapskate that I am, I went to the local musical instrument emporium and bought two Digiflex cables with Neutrik connectors. I am tempted to say that the sound is better using these inexpensive cables with the balanced connections on the LS 25 and Bryston 7B STs than the Blue Heavens with the RCAs. Go figure. This set me back a whopping $41.29 CAD, all taxes included, with no waiting time! "It will have to do, until something better comes along", with apologies to that great lyricist.
Score! (I've heard that expression used in hockey games.) Good for you - count one for our north-of-the-border audio skeptic. More money left over for poutine, eh?... ;^)