Cables are very system dependent. Look at systems that are similar to yours and see what they are using. You can search systems here. Power cables will make the most difference.
I have a system similar to yours and I use all Shunyata cables. My interconnects are older Shunyata Zitron Cobra XLR. The Cobra are great cables and the difference between the Anaconda is not that much. My speaker cables are Shunyata Zitron Anaconda. Again there is not a big difference from the Cobra. My power cables are mostly Shunyata Zitron Alpha but I have a couple Black Mamba. The Black Mamba are an excellent cable but have a bit of a following. So the price can be all over the place. I paid around $275. each when I originally bought mine.
I tried numerous brands of cables when I was looking. I found that Synergistic Research and Shunyata were two that worked extremely well. And I thought Shunyata offered the best value. It is easiest to tell with power cables. My ARC dealer recommended Kubala-Sosna or Nordost Heimdall 2. I found the Shunyata to be far better in my system. Remember that ARC Ref gear uses 20 amp power connectors.