I'm probably going to get sphincter-plundered for this but(t)...
my vote goes for the 3861 Hesalite.
Not vintage therefore not potentially finicky with no possible surprises, killer movement, lume for days, warranty for years, arguably the best Speedmaster bracelet to date (especially if you get it with the new updated micro-adjust clasp), fantastic price ~ measured against rare, limited or in demand models, step dial, •/90, streamlined packaging/presentation... and even though
@STANDY pointed out there might be issues (mine, purchased last summer, new, factory fresh, has had zero such issues ~ knock on available formica) but there might not be - and if there are they will be taken of by either your point of sale (AD or OB) or Omega dú Suisse.
I am way too fickle but if I had to, gun to temple, have a One & Done my 3861 would be it (or my 57 Seamaster, or my '57 Railie
👎).
Standing by for verbal abuse... I held the flashlight for my dad as a kid, I can take it -- bring it on.