I have had the 1926 80th Maduro, 1926 45th Maduro, 1964 Imperial Maduro, and 1964 Principe Maduro. They were all very good. I still have a couple of the 80th and 45th left and I have a box of the 1964 Monarca Maduro that I am saving for this weekend.
Overall I like the 80th the best so far followed closely by the Imperial and Principe. The 45th is excellent but just not as excellent at the 80th