Jay...Do not worry about the Balanced and Unbalanced scenario...its all relative to your distances from units to amplifiers and picking up noise...Read this thread and hopefully it will shed some light on the subject...the second and especially the third posts are on spot...
http://www.polkaudio.com/forums/archive/index.php/t-42977.html
http://www.polkaudio.com/forums/archive/index.php/t-42977.html