Dave, I kind of know what you mean with Sim Audio gear. Have listen to them with Shunyata cables and cond, PMC FB1 spk, sounded clean and open but slightly thin. My experience with my first RCA Statement upgrade was improvement overall, natural but did notice reduced mid-bass although the overall freguency response became wider. After upgrading my preamp power cable with Power Plus, the whole frequency spectrum become even again. It seems as though my preamp wasn't getting fed through with enough power to cater for those extra copper from the RCA Statement.. strange! The Statement interconnect can be sum-up as truely natural sounding, definetly carry the weight required and low level details, and lien just slightly to the warmth side. Just make sure your preamp and amp power cable are up to the task. My gear - ProAc 2.5 spk, AQ Caldera spk cable w./ AQ silver jumper, Symphonic Line pre and power, Assemblage DAC and upsampler. And as far as Lab II power cable, I've listen along with Balance-Audio gear, ProAc spk, AQ Everest spk cable, found the overall sound excellent but just slightly lacking low level weight, could be the AQ 100% silver spk cable?