Okay... I'm not trying to be rude here, but you have gone through a LOT of birds in a very short period. Am I correct in the following:
Umbrella Cockatoo- September 2011- was rehomed, unsure of date
B&G- August 2011 - rehomed November 2011
Greenwing- October 2011 - unknown date (you do state he was rehomed after 6 months)
Scarlet macaw - "had this bird for over a year"... Also rehomed?
The cockatoo bit you, you were concerned he might bite your kids, so you rehomed him. The B&G was rehomed becomes it became attached the the cockatoo and you felt it was best for the bird, the greenwing you were unable to handle (you say he's in a new home where he gets lots of time out of his cage, so that's good news

), and the scarlet I don't think you've posted about before.
And now you have a Catalina macaw...
PLEASE don't take this the wrong way... But I think you really need to ask yourself some questions:
- What is your motivation for getting these birds?
- Are you able to put in the work required to live with large parrots? Are you willing to do research, get bitten a few times, learn from your mistakes, and commit a lifetime of time to a bird such as a macaw (60-80 years)?
- What is best for the birds?
And,
- What is best for your family?
I'm not trying to attack you, but I think sometimes we all need to take a step back and think. You seem to have a lovely family, and a lot of your decisions are made because you want what's best for them (you don't want your kids to get bitten - you wanted a bird that wouldn't be aggressive towards your wife). And that's great, really. And I think you also are hoping to get a bird your whole family can be safe with and enjoy. I don't doubt your motives. But, you also must understand how complicated parrots are. Especially large ones. They DO bite and they DO become fearful and aggressive. They are wild animals that can't be fully trusted around children (unless maybe if you've had them for years and years. But there's no guarantees). Maybe all your family members are on board with the huge commitment parrots takes... Maybe they aren't. I think you really need to think about this.