Speaker Cables

Just use any ordinary 8-10 AWG copper wire and ferrule the ends.
They will sound perfect, look very neat and will not cost you a bundle.

If you are really picky, contrary to common opinion, I would choose a wire with less inductance than capacitance, all other things being equal.

Higher inductance will "resist" sudden changes of current (reverse EMF = -L di/dt), hence may limit the "punch" of sudden swings. Higher capacitance will start rolling off the higher frequencies. Depends which one is more important to you. To me, the "punch" is.

Your mileage may vary.

One of my favorites, which I still use on my office system was HD12D... something like that. Years ago, I think it was Stereophile or The Absolute Sound, just for fun, went to Home Depot and got a 12 gauge extension cord and threw it into the mix. It was actually really good. So, for my let's see... $5 or 6K system crammed in my office it is great. But for my main system with Sonus Faber Amati Traditional speakers and All Audio Research Reference stuff, it doesn't cut it. 

ghdprentice

For your main system, go up to 6 AWG then :-)
At that thickness, almost all copper wires will have negligible resistance.

Seriously, as I said, check the inductance and capacitance of the wire and buy accordingly :-)

Another vote here for Canare 4S11 cables.  Replaced a pair of shotgunned acoustic Zen Satori cables..  Very satisfied with them ! 

@cakyolFor your main system, go up to 6 AWG then :-)At that thickness, almost all copper wires will have negligible resistance.Seriously, as I said, check the inductance and capacitance of the wire and buy accordingly :-)I 
I find my Transparent Ultra cables significantly better in my main system. While I have not tried 6 AWG I feel I can trust the engineers at Transparent to have considered it.