This is something I have been struggling with the last two months. Buy a Speedy, and maybe the Seamaster, and then add a Railmaster if/ when the reseller prices dip? Or jump all-in for the full set? These will go to my son in 20 or 25 years, and he will potentially have them for 45+ years after that. So the thought of the full set is attractive, as maybe the set will prove over a 50+ year timeframe to be sought after.
I do not have a formal reservation for either singles or the trio, but I have an agreement with someone who has reserved both to do a deal one way or the other once the watches are delivered.