My personaly suggestion is wait till your dog is older. It is better to have one and give it the best care, attention, etc.
You still need to do a lot of training with Bimbo and if u get another one your attention will be diverted. they are big dogs and need to be socialised and trained properly.
As for the breed selection, you need to study the various breed individual traits and see if it suits you and ur living conditions before just getting one, as you may like its looks. Both breeds mentioned by you are very different and it shows u are going by looks and not what that particlular breed has to offer. So do more research on the breed and also cost of medicines and food for large dogs, plus male or female its positives and negatives.
Ur undivided love and attention is the best for Bimbo, I feel.