How to vote, how to vote....
Let's see, I've heard cables that fell into all of the price ranges and I'd say that for a large commercial offering (Kimber, AQ, Nordost...) while there is a point of diminishing returns, there is also something to some of the expensive offerings, I guess it depends upon the resolution of the system. So not gonna vote for the prices.
Construction is a different story - low cap, generally good, although I've hears some really good higher cap cables (again system dependent.) Flexibility and robust construction should be a given, but like all assumptions.....
Now the exotic materials idea is rather ummm, unique. Silver? Gold? Platinum? Teflon? Kapton? What defines exotic? Right now I'm using Grover cables, these are a silver and copper mix. I've heard good things about the Crystal cables, as well as KCIs, both of which use gold, so who knows??
Maybe you should also add a questions regarding a consistent "loom" or mixing cables.