As a previous Volcano user, I would recommend listening to the AQ KE-4 and AQ KE-6 silver speaker cables. Even the cheaper KE-4, which costs only 2/3 of Volcano, is vastly superior than the most expensived AQ copper cable (Volcano). Much more open, and much more natural sounding, especially in the midrange, where MB/Volcano are a little bit to forward for my liking.
AQ KE-4 actually made me sell the more expensive AQ Volcano. And even though, I eventually settled on a fabulous AQ Kilimanjaro (which basicly is KE-6 with a more elaborated geometry), I still think, that for the money, nothing can touch KE-4. IMO KE-4 is the best value cable in their whole lineup.