I know there is no objective answer to this question but I'll ask it anyway. Within my modest collection, I have acquired the following: 1984 Speedmaster (my first) 145.022 1970 Speedmaster 145.022-69ST 1971 Speedmaster 145.022-69ST SW Apollo XI What should be next as far as Speedmasters go? Which reference does every Speedmaster hoarder have that I don't?