How much grooming do you want to do?
Do you want a 'herding' dog or a 'working' dog?
How much 'adoration' do you need? Or the PVine?
Aloof, cuddly, Strange Human friendly?
How much money do you want to spend?
How much barking will you allow?
Do you want it to bark to scare off things?
Chase them off? Attack them?
Inside dog? Outside? In/Out?

I'm thinking probably a Working Dog, or working dog mix. See AKC Working Breeds for a general idea of them all.

If you are lucky you can find some suitable mix at a shelter nearby.
Please! Spay or neuter!