I look at Cardas wire and it's expensive, about $3.5 / feet. Another option is Audioquest (star quad like Canare). Do you know if Audioquest is good?
I like milspec hookup wire - this stuff:
http://source.as/pdfs/tyee.pdf . At 8ga, it's very stiff (which is sometimes awkward) but it's tough, doesn't change with time (or with heat, or acid, or smoke, or much of anything), looks big and impressive, and has the low resistance you want. The silver plating on the copper doesn't lower resistance all that much - any good 8ga copper already has very low resistance - but it does mean that the copper isn't going to tarnish with time, which is important, and the silver helps it "squish" nice and tight in a binding post.
I found some for $1.60/ft (keep in mind that's *1* conductor, not 2). I use it bare on speaker posts, making it the simplest and most elegant DIY effort possible: cut, strip, wrap, tighten, done. The lengths I use (runs of less than 12') have absolutely no discernable 'voice' whatsoever.
The military uses this stuff for higher voltage, higher frequency work than you will run into in *any* audio application.
