Duel, if it's long, slow, Leonesque, with great music. Shootout when it contains slow-mos, machine gun, lots of dead Mexicans and chaos.
A lot of good movies go wrong because the final duel isn't well directed. For example High Noon. It's such a great movie, and that shooting thing at the end... gahh. Not to mention I'd have killed off Kane. Wouldn't it be just shocking? Yes, he could have shot the bad guys, but get deadly wounded, too.