Siltech G5 range compare with Stereovox Reference

I recently acquired a set of Stereovox SEI-600 interconnects with their new terminators. I need one more set of interconnects along with a set of loudspeaker cables. However, I cannot quite make my mind up about the merits of the Stereovox reference cables in comparison with the Siltech SQ-110 G5 cables that I also use.

The back end of my system consists of Audio Research VT-100 power amp, Audio Research LS25 MKII pre amp and Talon Audion Hawk monitors. I would like to purchase the same speaker cable (Siltech LS-188 or Stereovox LSP-600) to go with my selected interconnect.

My question: has anyone experience with these two cables and a second opinion on their strengths and weaknesses and possible performance in my set up?

Many thanks