You might also consider trying another AZ Silver Ref. in place of the Matrix Ref. you have now. Matrix is a nice, full-sounding interconnect, but it can't match the Silver Ref. in terms of detail, air, soundstaging, etc. If those are improvements you're looking for I'd think the Silver Ref. would be a significant improvement while still maintaining things like tonality and musicality that sometimes lose out as other things (like detail/air) increase. Haven't heard the Nordost in my system and they're certainly worth a try as well, but not sure I'd mix AZ and Nordost in my system. Probably better to try all of one and all of the other if possible and decide which house sound works best for your ears/system. Best of luck.
