Ditto... what sort of improvement (s) or changes are you seeking?
I've tried 3 or 4 of the SR ICs. I kept the Resolution Ref x2 actives over the Acoustic Ref, Accelerators, & Alphas. I posted a review on the RR x2 as well. that one came out on top of a whole covey of cables, BTW. Great bass, sound stage dimensionality, great presence too.
The SR Resolution Ref x2 active, would be a huge step up from the AZ Matrix ref II ICs. Perhaps a step up from the Silvers too... again, depending upon what it is you seek to modify.
I've found when you don't run all the ics from the same co. that the mix is more the thing. Too much rich and full type wires dulls the presentation. too many dynamic and extended wires thins things out and becomes just hi fi sounding.
Currently I have the HT magic II as main, and Nirvana SX Ltd off the source and have the RRs off the source's secondary outs to my receiver so as to add some body and extension to that all SS deally.
Of all the cables I've used I like the SX Ltd and SR RR x2 the most, with others falling in line where they are best suited... yet again, the SX and RR are more alike than different, so I prefer usually not to run them both together... but it does come down to the genre of music I want to play too. Personally, I'd like to have another MIT Magnum series cable on hand again in place of the Magic II. the HT Magic II IMO is a poor mans Magnum.