Hi Andy, I too have KT88 tube amps, Rogue Audio 120 watt mono blocks and their 99 preamp with Sony SCD-777ES cdp. All the gear is pretty new except for the Proacs. I am also looking for new speaker cable. The last pair I had were Nordost Blue Heaven bi-wired. They were ok but some of the midrange was missing and I never could tell the difference in the bi-wire vs. single run. I'm considering Acoustic Zen Satori. What are you considering? In your opinion did the bi-wire make a major change or only subtle? Anyway lets keep in touch since our systems are similar. Thanks, John my e-mail is radiomanjh@aol.com