speaker cable recommendation

Hi, I would like to upgrade my Tara Labs Phase II (bi-wire) speaker cables. I currently am using a Decware Integrated tube amp and ML SL3's and a Decware silver RCA interconnect. I believe that I have enough warmth and would like a very detailed sounding cable. I may wind up using my current Tara cables for the woofers and therefore may not necessarily need another bi-wire setup. A lessor known cable company is fine. What are your opinions as to the best used cable for say $200-$400?

thanks to all, Paul