While you can find some esoteric discussion about skin effect with cables, the reality is that strand count doesn't matter for sound quality. You could use 12AWG romex cable and have great results, but as mentioned, the strand count is what allows the cable to bend more easily. This is not a topic that is brought up very often during DiY installations, but I've pulled tens of thousands of feet over the years, and certainly it has been something that I've considered over the years.
Cable flexibility, jacket flexibility, ease to strip the cable, cold weather flexibility, etc. As much as I hate to say it, I am a huge fan of the Monster pro installer cable. It is, by far, the best I have ever used. Still, I've also used the stuff from Monoprice, and it works just fine. Not as easy to use, but for a single installation, I wouldn't think much about it. For that matter, once I'm done with my stock of Monster, I will be switching to the Monoprice product.