You can't go wrong with the Vario, they have the best reputation among BF20 class mills.
Just realize that you are going to need several hundreds if not thousand $ for tooling to go along with the mill.
You can find some examples of tooling packages of varying prices here under accessories g0704.com.
$ output will only increase the longer you go for tooling, there will always something else you find you gotta have.
It's best in my opinion to get the most mill you can upfront, the money for accessories will come in time, piece by piece.
Hoss