Thank you Stan and Almarg. I have since read that Richard Vandersteen recommends use of the same wire for biwiring. Maybe he's on to something. Maybe I could try Clear Day shotguns.
Biwire with different cables?
Spoke with an Audioquest factory guy today and he suggested I biwire my Vandy 2Cs using the same wire for hooking up both high and low ends. I got to thinking that to help correct a slightly muddy bottom, I might try using a silver cable there and copper on the tweeter/mid posts. Any problem doing this or experiences? Suggestions on low cost cables? I use biwired Anticables now.