Where to buy good automotive wiring?

Del city is good. Purchase from them before as well for the 10-22 ga wires. I bought power and ground wires from local audio store and also from Stinger. I didn’t want cheap wiring to be carrying the power or ground.
Car Audio Power Wire - Stinger

The connectors I also purchased from amazon. NASCAR style for the bulkhead and regular 1-2-4-8 pin for the rest. Spent maybe 80 bucks on those all together to tuck the wires and refresh the cars wiring. That way if you add things later down the road you have extra pins in the connectors to add to and make it look neater. It says 12-20 ga but is actually 8-22 ga.

22 Position Delphi Weather Pack Connector Kit 12 to 20 AWG w/Locks https://www.amazon.com/dp/B00EZSHYVQ/?tag=joeychgo-20