speaker cable recommendations for Joseph audio perspectives2

I have a pair of Joseph Audio Perspectives2 floor standing speakers. I have yet to pick a pair of 8ft speaker cables for it. My budget is around 2k usd, 3k usd max for a used pair. My amp is wells audio innamorata signature. The rest of my set up can be found in my signature.

I cannot use speaker cables that have boxes (like Transparent, MIT, etc) due to space constraint. Now I am using a cheap pair of blue jeans 10 speaker cables. I have not tried many speaker cables before, so when I borrow my friend's taralabs 0.8 speaker cables the other day, I was blown away how it improves my system's overall performance. So I decided that I need a speaker cable upgrade.  Thanks for any suggestions.