Given the comments so far, I'm thinking maybe the collapsible/extendable aluminum ones would be best. Collapsed, they'd be pretty stout. Extended, they'd be weaker, but still better than not having something. My preference is my oak cane, but I tend to leave it home more because I hate to mess with it when I don't need it.
Although I have not seen it myself, several officers have told me they've broken ASPS over people and will never use them again. And I like ASPS.
But the likelihood of an old fart like you getting into a rumble are probably pretty low, get whatever cane you're comfortable with.
But you gotta' name it. Just because. And you know what.