Asking which way to go on a Star forum, is going to get you a Star answer.
Anyway, do not believe you can go wrong with either of your first two options. You already have one, so you know the quality and reliability. One Universal with additional heads and you are good to go for everything you want.
In my opinion, the main reason to consider a Dillon is that startup cost should be a little less of an investment, but depending on which model and options, it could cost just as much if not more.
And based on die availability, etc. you could be up and running with a Star a little quicker.
Good luck