Better than guns?
"Personally, I rather face a cop with a taser then one with a gun."
I'd rather face a cop with a gun than one with a nuclear warhead.
"At least with the former I can always try and sue the police for wrongful arrest, excessive use of force or whatever."
What prevents you from doing it if the guy uses a gun? (assuming you're not in the US, where the cops can't stop at one)
Anyway in this case it seems like the use of the tazer might have been justified. If the guy was armed, completely out of control, and threatening directly the life of other persons... if not (like, if it had been possible to let him wreck a couple appliances while keeping everyone else safe, it should have been done. What's wrong with charging him for the broken furniture/windows/whatever after he'd calm down?). But again, in this case at least it sounds like there might have been a valid reason to deploy the tazer.