Most transparent open & dynamic cables out there?

Hi, my system currently consists of entire Classe Omega set up including the monoblocks and Tannoy Kingdom 15 speakers. Tannoys are great, powerful and monumental, with tons of bass but they are rather slow and heavy sounding with rolled off highs, even driven by almost perfect amps like Omega. They also don't respond well to either jumpers or true biwiring - it slows the sound even further. So what I'm looking for is classi bi-wired cable to open the sound a bit with great speed and dynamics and tight punchy bass. Thanx!