I've studied this problem analytically. The results show that with TYPICAL amps and preamps (SS) and cables that are in the same quality range that the optimum ratio of speaker cables to IC's is between 3:1 and 1:1. Typically you cannot go wrong with 2:1. See the Audio FAQ page of my website for the analysis:
http://www.empiricalaudio.com
http://www.empiricalaudio.com