I've always heard it's best to have males outnumber females in a budgie flock because multiple females will fight with each other. I don't know how much truth there is in that, though.
If you can get a handle on three budgies at one time, why not adopt both?
Sounds like your flock is another example of what I've heard...females are in charge in a budgie flock...This is true, but it depends on the personality of the female(s) in the flock. Both of my boys (Manny and Happy) are sweet and docile, and Jersey is very .... let's say "matriarchal." She's definitely in charge.