Well a zombie brain wouldnt be exactly like a live human brain. If you hit a human in the head with a prybar, it will definatly knock them out, possibly cause a fracture and kill them. But if they did die from it it would be more than likly due to bleading inside the skull. Im not sure a zombie could be killed by a blunt blow to the head unless it was truely devistating. Have you ever hit anything really hard with a prybar? It numbs the old fingers pretty good.
A lightsaber! Can cut through anything, and never has a dull edge.Ok, in all seriousness, I guess if I had to go with a sword it would most likely be a katana. I know, a somewhat obvious choice. But its just what'd I'd rather have. In the case of any blade, I'd go with a Kukri machete.