Goertz M12 sp cables - any good?

I'm thinking of purchasing these speaker cables for my system: Totem Signature 1 on dedicated stands, Sonic Frontiers SFL-1 preamp(w/ NOS Telefunken 12AT7), Kinergetics Chiro C200 amp linked via Synergistic Research Mark II interconnects, Ultech UCD-100 digital front end linked to the preamp via Goerts Micro Purl silver. I am currently using an Audioquest Indigo plus speaker cables and want to "upgrade". My budget is quite limited, around $150 for a used 10' pair...Would the Goertz M12 be an upgrade at all?.....thanks