Problem with solid core in binding posts is that the wire doesn't compress and fan out like multistrand does, which limits your contact area when using solid core...if you are worried about such things.

But yeah, when it comes to speaker cable, I'd trust an engineer or scientist over an audio salesman any day. Anyone who is trying to sell cables with a certain "sound" ought to be shipped off to the hoosegow.

Cables are not an additive device...a cable cannot add sound to a signal, it can only remove it, so a cable that sounds different than what is naturally coming from the output source is removing sound...which is bad.

If you can honestly hear the difference between high purity copper cable and silver cable, more power to you, although I think that the silver cable supplier gets more out of the deal than the buyer.