I would look for the one I felt a bond for and wouldnt settle until I found it. When you see 'your' bird you will know, trust me. If you dont get that feeling, you, in my opinion should keep looking.
Pay special attention to the breeders living conditions first and foremost, making sure it is clean. I, personally, do not recommend buying from a pet store but that is my personal preference. I feel this way for many reason I can note if you are interested. Secondly, pay special attention to the other birds around... how do they look/act? Then it is onto inspecting your baby.
Look closely at the feathers and beak for any signs of disease. I would research this beforehand so I knew what I was looking for. I would get the youngest baby I could but after its feathers have grown in... 3-4 months old at most. Expect babies to be nippy so dont let that sway you. Like I said, this seems like a dawnting task but it isnt, when you see 'your' bird you will know it.
