Am I missing something? The Callisto, which I've owned, is a wonderful speaker, originally retailing for, what, $2200 and now retailing for $2900. Now there are 3 posters who recommend speaker wire (Virtual Dynamics) that retails for $2200 for a pair of 8' cables?! With all due respect, that's an insane recommendation.
Man, the Callsito owner would be much better served by moving on to a pair of, say, $4,500 speakers (GMA Pico Mideo?) and using the remaining $600 for a pair of "budget" cables. Or, as Drubin suggests, investing some of that $2200 cable budget in amp or source upgrade(s) and some on, say, a set of used GMA floorstanders, and still have a few hundred left over for "cheap" speaker cables.
For what it's worth, I used Paul Grzybek's (Bizzy Bee; Tube Audio Design) Fro-Zen cables with my Callistos and enjoyed them thoroughly. I got them when he first introduced them (a 15' pair for about $150) and much to my surprise I found that I thought they sounded marginally better than my 14-guage Home Depot utility cords. Marginally. Barely, but it still surprised me that there was ANY difference.
I still have the Fro-Zen's, although I'm thinking of trying out Blue Jeans Cable's bi-wire cables for my new, used GMA Continuum 1's.
Good luck, dude, and make sure you keep your cable spending in proportion to the thing you're cabling!