I voted Vampire Killer, but personally I want the four-barrelled shotgun from the Phantasm movies.
And Lefty's (The insane sheriff from the second TCM movie) double-chainsaw combo puts shame to damn near EVERYONE trying to look cool with a chainsaw. Except Ash.
Lastly, the BFG9000 and the Cerebral Bore for a macho, ham-fisted first-person finish. Bona fide awesome.