I'm rather perplexed, because you seem to change the situation you want to prepare for, and it seems you change the situation to argue against the advice people are trying to give you, just so that you can carry the stick like you wanted. Robber/potential murderer is not "guy with an attitude."

We can be more helpful to you if you spell out exactly what you're preparing for, and then stick to it. For the situation you describe, I'd recommend the most powerful weapon you can legally carry, and then get a lot of regular training with it, so you can actually respond to extreme force with extreme force. Arm your vehicles. With this level of threat, you're not talking about scaring them off anymore.

If you just want to have a fancy stick or maybe a "death-dealing" stick, there are probably forums where people know the products better.