Zavfino

@sdl4,

By no means, Fusion is a bright sounding cable. If you feel your current cables lacks bit of top end details then Fusion will add touch of 'sparkle' without being edgy or bright. 

As @thyname stated above, PC-OCC is currently the purest copper conductor currently available. I suggest you reach out to Raymond and try to audition both cables and let your ear guide you which cables offers the best synergy in your system. 

Thanks to both @lalitk and @thyname for the helpful info. 

So I guess that both PCOCC and OCC are Ohno Continuous Cast copper, but the PCOCC copper is at a higher level of purity. I'm assuming that any OCC copper is continuous "single crystal" copper, but maybe that's not the case.

Listening to the different interconnects certainly makes the most sense, but I noticed that Zavfino's return policy includes a restocking fee so I wanted to pin down my cable choices as much as possible before ordering anything. If cost were not an issue at all, I would simply get a 5-meter length of the 1-meter Cardas Clear Reflection XLRs I use now, but I haven't been able to adjust to the idea of spending more than $3k just for a pair of long interconnects. It looks like there are some good values in the Zavfino cable lines, and I'm just trying to see if one of these options might work in my system. I guess I'll need to let my ears be the judge.

@thyname, I'm tempted to try the speaker cables you listed but I really prefer spades all around. 
I've owned a full loom of Nordost Frey 2 and speaker and int from Purist Audio Aqueous. I also think the A21 are good speaker cables. I downsized years ago and went with Acoustic BBQ 12g from Bill on this site. I'm skeptical when a bunch of people jump onboard something new but it's only a cable. Thanks for posting about these.