There is no debate on this because CCA is pretty crappy. It has a big issue with cables breaking and not being tolerant at connection points if the put pressure on the cable itself.
Just getting solid copper doesn't cost a ton more and is a much better overall decision. This isn't electrical work, and most people do excellent with 14 gauge wiring in their theater space. The runs are short and the power is rarely more than a couple hundred watts (if anywhere near that).
Be aware that you need in-wall rated cabling if you are putting stuff in your walls.
But, seriously, the price difference makes no sense for someone who cares about long term quality.
100 feet of 14/2 CCA cabling (not in-wall rated) off of Amazon is about $16
100 feet of solid core cabling 14/2 (not in-wall) off of Amazon is about $26
This means that for 10 or 20 bucks more, you get wiring that is far less resistive overall and a much better long term solution. The bottom line is that if you are buying thicker wire to handle more power, why would you get wire that is inferior?
Oh, and Monoprice is a pretty good go-to for cabling as they are fairly up front with their descriptions. Mostly talking about 'PURE COPPER' for their non-CCA product and only having a couple of CCA products at all.
Monoprice, Inc. (DBA. MonoPrice.com) specializes in the wholesale distribution of world class cable assemblies for home theater, PC, and high technology industries. MonoPrice.com offers a wide range of products from standard PC products, network cables, and HDMI cables to custom cable assemblies...
www.monoprice.com