Hi Jay.
You have done your research which is great, but its a decision you have to make depending on the amount of work you are willing to dedicate to your hobby.
Personally, I like the idea of starting with a large group of smaller fish, to bring them up to their best potential, with the needed amount of care, and water changes. As they become larger you can thin the group out, keeping your favorites to suit the size of the tank.
I really like seeing the development of small fish, and colors starting to kick in. To make your task easier, buy fish from a reputable source that suits you.
Good luck with what you decide, and keep us posted...pictures are always welcomed on here.