Which plane would you prefer to fly on? I understand that you currently fly the Boeing 767, so hopefully the answer won't be too bias.
Boeing 767 vs. Airbus A330 (I consider them rough equivalents since Delta switched the PDX/NRT route with the 767)
Airbus A330 vs. Boeing 777
Boeing 747 vs. Airbus A380
Boeing 787 vs. Airbus A350