Speaker Cable Recommendations

I recently sold a pair of monoblock amps and got a tube integrated. Since this is in my rack on a side wall, I now need a long set of speaker cables, minimum 20 feet to reach the left speaker. Budget is around $500. Looking at both factory-built and DIY options. Blue Jeans Cables are probably the cheapest I’m considering, but also Cardas 101, Analysis Plus Clear Oval and Transparent Audio Wave and the usual Audioquest and Kimber Cable models that can skate under my budget. Then VH Audio or other bulk cables for DIY. I’ll also consider used, but there aren’t too many out there this long. Anyone have additional suggestions?