I am very close to your selection. I love history of speedmaster and classic design, so went with speedmaster in black and then want the polar explorer ii. I give up a little water resistance by not having a dive watch, but I like changing straps with speedy and think it looks great with a suit. The 100m with the explorer should be enough for my usual swimming. The white dial seamaster looks so cool though so maybe someday I will add that too!