ultimate interconnect recommendations

I'm looking for some recommendations regarding the ideal interconnects between my preamp and power amps. I have an interesting situation using a Linn 5103 preamp and two 5125 five channel amps with active crossovers for my front channels. As I have different channels of amplification for the tweeters, midranges and woofers, it occurred to me that I could optimize the interconnects for each frequency range. I'm looking for the elusive combination of crystalline, detailed (but not harsh) treble, warm, natural and full midrange and tight, full bass. Each of the three pairs can be a specialist. I am currently using Harmonic Tech AC 11 power cords and a Pro-Silway II between my DAC and preamp. The speaker cables are Linn 600 triwire. Thanks for your help!