An '03 des Dieux I smoked about 4 years ago. Pure class and extraordinary complexity. Curiously, out of two cabs I have not had another that was equally transcendental. Don't quite get it, but I keep hoping to repeat with the remaining few sticks I have left.
Runner-up- a Monte 2 on the beach in Cabo about 15 years ago. I bought it down there, legitimate goods, and it was remarkable. Have had hundreds since, some close, but none as good as thet one. When Monte 2s are on they are spectacular.