I haven’t tried RCA vs XLR under the assumption that XLR > RCA, let me know if you try it yourself.
As for the cables, I just tried Siltech in this system, I’m quite happy with it, I don’t feel like the cables are restraining or colouring anything.
I was initially between Siltech and Shunyata but being in Europe, the similar line of cables from Shunyata would have cost double the price of the Siltech.
About the new classic legend line, I haven’t tried them myself but my dealer told me that they were more extended in the high’s and low’s and could give a sense of a less organic medium vs the classic anniversary. I’d still like to try them myself at some point.
About Shunyata being good cables, I have no doubt, but they specialise in their noise reduction technology. So in my eyes, it is treating a problem. I decided to go one step further and eliminate the problem by installing dedicated lines.
Before you look at any cables, you should really look into this possibility if you have the chance.
The cost is relatively modest and the results are more than worth it. It is not the same system plugged on another outlet. It is really a huge difference. Completely noise free and huge dynamics.
IMO it is the first thing that should be addressed in a HIFI system before anything else.
After months living with my system now, the biggest yields have been obtained by optimising the power at different places.
Also, if your system is new, expect 5/600 hours before you can make any valuable evaluation.
It will be impossible to objectively compare cables before you have reached that point.
Let me know if you’re interested about more tips and my experience optimising this system and if you need more details about the dedicated lines.