Typically I buy highly reviewed audio equipment. This gives some assurance of sound and build quality. Components must be of the right flavor as well as excel at performance. Interconnects are even trickier, since there is a real question of synergy. So, I would recommend choosing from highly reviewed main stream interconnects. Also, trying before you buy. The cable company has a lending library so you can find the right brand for you. Buying among the hundreds of off brands in an attempt to save money can easily satisfy you while performing poorly.
You have a lot of good components... I’d take your time and verify what you put in is optimal. I use Cardas, DHLabs, Transparent and Audio Quest as my go to... but it is very system dependent. I have all Transparent on my system today.