You might take a look at Alpha-Core Goertz MI2 speaker cables. I have been using them for about 3 years and been extremely pleased. In your setup, the A-C Goertz speaker cable has two virtues:
1. the cable has very low impedance, so longer runs are not a problem;
2. Alpha-Core states on their web site that you can use uneven lengths of their speaker cable without causing problems.
Alpha-Core offers a 30-day money-back trial if you order from their web site, so you could try them to see if you are satisfied. Here's the link to their web page for the MI series of speaker cables:
http://www.alphacore.com/mispeaker.html
1. the cable has very low impedance, so longer runs are not a problem;
2. Alpha-Core states on their web site that you can use uneven lengths of their speaker cable without causing problems.
Alpha-Core offers a 30-day money-back trial if you order from their web site, so you could try them to see if you are satisfied. Here's the link to their web page for the MI series of speaker cables:
http://www.alphacore.com/mispeaker.html