At the speaker I've gone with $.25 plastic wire nuts with a bit of electrolytic grease to seal the nut, but not get in the wire. No oxidation, no added metal mass, and a stronger connection than clamping with a binding post or nylon bolt and nut. I can't find anything that checks so many boxes as well... and did I mention the 25 cents part? I seldom disconnect, so there is little inconvenience.