I'm currently using the Acoustic Zen Silver Matrix from my DAC to preamp and the Matrix Reference from the preamp to amp. I find this combo provides the fullness in the mids that is a strength of copper while also preserving the detail, air, transparency, and snap of silver. Robert Lee of Acoustic Zen says a lot of people find this to be a good combination, but I haven't tried all Silver Reference yet so can't comment there. Huge step up from the silver plated copper ICs you're probably talking about with lots more mid and bass information coming through--overall a much better balance. Of course, cables are extremely system dependent so you should obviously demo several types before you buy. Best of luck.
Tim
Tim