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

@b4icu
You wrote "The Bi wire - Bi amp on the Gryphon Pendragon Mid/High unit won't give you any improvement. only cost way more, if you think of another pair of CH M1's ($37,000.- each)."
No, that's a little misunderstanding, I have no intention to buy another pair of M1 amps. Currently I'm using one M1 in stereo mode. Later I will add another M1 and will operate the units in mono mode. So no bi-amping. just mono blocks. The bi-wiring cable is just there because it has been there for many years, not specifically for this set up. I have no intention of buying another cable, just use as is. 

@b4icu
This has been interesting and might I add amusing to read.........OK, I'll play, why not, I might learn something useful.........Bryston 4BST amp, bi-wired to Vandersteen 3A signature speakers. Advertised DF is 500+ if I recall correctly.........Currently using 15 foot runs of Belden 10AWG, two per speaker to single terminal on the amp.............What's your suggestion?

Sorry for the double post, site isn't acting right :(

So, 10 milliOhm is going to make a big difference? That's 0.010 Ohm resistance. Really?