"My research shows maybe HDM Hermosos No.4 Anejados???"
your research is flawed. worst choice possible among ALL of them.
Cohiba IV or VI would be excellent, Trinidad Fundadores if you like skinnies, Cohiba Lanceros if you can find them.
Partagas Lusitanias or Romeo Churchills for a long smoke.
I would buy two different types and have alternate ones every 6 months.
after 10 years you would be well informed about age and potential.
good luck going for 20 yrs............