Hi: Unfortunately, S7's price guesstimate on the Kimber 8TC is incorrect. The MSRP for Kimber 8TC recently increased to $14 a linear foot, and 4TC is $8 per linear foot. However, Kimber Kable 8VS and 4VS fall within your budget, and are also very good speaker cables that offer high value. The only difference between the "TC" and "VS" cable lines is the material used to insulate the stranded wires: "TC" (abbreviation for "Teflon coated") uses Teflon, whereas "VS" (abbreviation for "vari-strand") uses a less expensive dielectric insulation.
You could either use the 8VS for an internally bi-wired setup, or use two runs of 4VS in a true bi-wire configuration. My personal recommendation is to use 4VS in the true bi-wire configuration, since internal bi-wiring tends to negate the whole reason for bi-wiring: complete physical separation of the carriers for the mid/high frequencies from the low frequencies.
You could also make a true bi-wire cable using 4VS for the mid/high frequency section, and 8VS for the low frequency section (which carries more power to drive the woofer). I assembled such a bi-wire pair for use in my son's audio/HT system, and it works very well.
Contact any Kimber Kable retail dealer -- they should have the "TC", "VS", and "PR" lines of Kimber speaker cable for sale in bulk, unterminated form. If you don't have a local dealer, check Kimber's Web site for a dealer list:
www.kimberkable.com
