No one actually knows how to lculate what speaker cable they need

I have just read through this thread and now I am dizzy.

b4icu,

No, really, you're totally clueless. 

Twisting and braiding wires doesn't create inductance, it reduces it. It's just a fact. Running wires straight and parallel increases inductance and crosstalk between conductors. Go rip apart a USB cable, SAS cable, Ethernet cable, HDMI cable, or practically any cable designed to carry signals at any sort of high speed with precision. The signal pairs are always twisted. Braiding is just a technique to uniformally twist all the conductors. No fancy magic there. 
ALL wires have impedance, inductance, and capacitance. We can know this because it's very measurable stuff.
The inductance of a conductor is directly related to it's thickness and dominates the transmission characteristics of the conductor at high frequencies giving rise to skin effect and in part dictates the impedance of the conductor according to frequency. Wire inductance is so easy to precisely measure we can accurately measure the power flowing through a wire using an inductive pick up. Most electricians have these tools in their toolbox. 
The capacitance is a result of the conductor being insulated, be it by air, plastic, cloth, paper, rubber, or whatever covers it. It's unavoidable if you intend to build practical cables for anything. 
The resistance of a speaker cable is almost irrelevant since we're not dealing in DC currents here. We're dealing with AC signals and impedance is the appropriate measure of resistance. If moving huge amounts of current to our speakers was the only consideration we'd all be wiring our speakers with jumper cables, but obviously we don't. 
You genuinely don't have a clue what you're talking about and it's obvious. This is stuff they teach in high school physics. You've got no business running around claiming you're any sort of expert on cables if you don't even know all wires have impedance, inductance, and capacitance. 
As for input transistors on power amps....
NO, they are absolutely NOT purely resistive loads. Even the best JFET small signal transistors have small capacitances at their gate that vary with frequency. That's why amplifier input impedance typically sinks as the frequency rises. Along with that, they have small inductance values, too. If you're dealing with an amp with a stupidly low input impedance like 10K ohm, you're dealing with an amp with BJT inputs. BJT inputs are current driven devices, not voltage driven devices, so interconnects with more current carrying capacity are in order. If your amp has JFET inputs like mine, with a 100K ohm input impedance, less current carrying capacity is required. In fact, you can use Litz wire for the IC on an amp like that very effectively. However, it's not recommended with high bandwidth amps because it can induce ringing in the amplifier because there isn't enough inductace to damp high frequency reflections up and down the line. 
Ya know, you could just look this stuff up and learn before coming here and saying silly things like you do. Unless you've got some sort of documentation or formula to back up what you're talking about, I'm calling BS and snake oil on you. 

ThePigdog: Think of it as Gabriel Marquez meets Hunter Thompson. Then it becomes art. Found art.

For folks really trying to understand this stuff, you could do a lot worse than googling Waldo Nell The science behing speaker wire. 
He discusses real engineering with real math.

Ganainm,

Google: Monsterslayer.com for silver wire.  Scroll to the bottom of their ordering form to find the .999 wire.  Or, just call them.  Very courteous staff.

Given your background, I would be most interested in your feedback on copper vs silver.  I have built and bought XLR’s and speaker cables with both.  I prefer the lifting-of-the-vail provided by silver.  I read that others dislike the shrillness or glare of silver and prefer the warmth of copper.  

I like hearing the reflected sound of the room in which the performance was recorded.  For me, detail is more important than warmth.  Tight controlled bass, for me, is more pleasing than detail killing boom, assuming both reach the same SPL at  30hz.  I find that DSD recordings lack shrillness and produce realistic sounding bass through silver interconnects and cables.  44.1mhz 16bit recordings do sound “shriller” or contain more glare to my ears.  I suspect copper wires would tame the glare.

I am concerned that I am biased because I came up with a minor twist in cable design and I recognize that cables are tone controls.  BTW, I have spoken to others who have experimented with the ladder speaker cable design.  Cable TV systems originally used ladder line (naked copper separated by clipped-on 1/4“ wood dowels).

I am equally concerned that other listeners just prefer to hear that which is familiar or that less vailed reproduction by interconnects and/or cables amplify shrillness in source components.  I glean from your comment that, “familiar” to you, is the live performance.  Hence, my interest in your opinion.

I will be ordering the 0 AWG copper and assemble ladder speaker cables.  I remain curious.  Please stay tuned.

Thanks for the kind words.

All good wishes,