I've got working mals, and have handled lots over the years.
I love them dearly, but wouldn't recommend them as pet dogs, as they can be very difficult. Stubborn, energetic, very, very sensitive, stubborn, aggressive with a very high adrenaline level, stubborn, destructive, and stubborn. (Cyrus, care to add to this?

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They can be single sex aggressive, so if your new dog is another bitch, I would be very careful. Dogs tend to forget arguments very quickly, whereas bitches can hold a grudge for ever!
I researched the breed for 4 years before we went on a puppy list - the breeder we chose (I think she chose us lol) breeds for temperament, as well as working ability, and her pups are very sought after. We were on that list for a further 3 years before a litter arrived. So, in all that time you'd think I'd be ready for them - not a chance!
They entered our lives like little dervishes, and 2 years later, they are still the same. We, on the other paw, are broken, battered, scarred, and our lives have changed completely.
Your girl sounds lovely; single mals can, sometimes, be calmer, but be very careful introducing another to the mix - especially if it comes with 'issues'.
If you are on fb there are lots of good mal sites - pm me if you want a list, or any help etc.