Personally, Luke vs Vader ROTJ will always be the battle. Especially when Luke lets his anger get the best of him, the male chorus kicks in, and it's just a powerful moment. You feel the weight of the scene. Son against Father. Son threading dangerously close to becoming that which he fights. It's short, but it pretty much makes the film along with the space battle and unmasking.

Hmm.., MeBeJedi sniped me here. I too like the ESB and TPM duals for the same reasons. They're probably two and three repectively. I'm hoping ROTS can ehco some of that power like I long hoped it would. I'll know in about fourteen hours.