Performance Audio has Mogami 3104 for 5.11 per ft.
I bi-wire with it. Very neutral and high quality.
Mogami - Quad 12 ga. in the house!
Found an excellent (i.e.. inexpensive) source for Mogami's 3104 speaker cable. It's arranged as a quad 12 gauge cable, so you could bi-wire or combine to make a 9 gauge cable.
Less than $7 /foot from Markertek. More expensive from Parts Express.
More when the pants show up.