Speaker cable recommendation

I have yet to hear the speaker cable (or power cord, or interconnect) that was system dependent. Every single one I ever tried had exactly the same effect on the sound regardless of where it was used. System dependent only makes sense if people think its a good idea to try and cover up one fault with another. Granted this is indeed what most people think. And do.

Oh well.

I actually have had this issue many years ago, as some cables are high capacitance. I can't think of the company, but one component mfg only recommended one cable company

That aside, warm sounding tube systems tend to sound better with silver cables, whereas SS often sounds best with copper, which is 'warmer' sounding
hth

I think with your speakers you will be very happy with the Kimber 4TC and not sure you’d benefit any with the 8TC as the 4TC is going to deliver everything to the lower frequencies you’re speakers are capable of. Just buy a single run, meaning not a biwire set and use jumpers instead at the speakers. If you’re buying direct from Kimber I’m sure they can make a jumper set for you or just buy a foot more cable per side and build your own. 

Here's some insighthttp://www.roger-russell.com/wire/wire.htm#introduction
If anything, it's good to read as much as possible before opening the wallet