Birds are way tougher than reefs. We have had both and not even a question.
Just a quick story from when my wife rescued birds. (Hi I am Nikki, Mike's Wife). Several years ago, I worked for an avian vet. A hoarder situation took place, and a number of birds came to the animal hospital as rescues. One of them was a Moluccan cockatoo, his name was Teddy Bear. Long story short, I took Teddy home. He lived with me for 3 years.
Cockatoos are not as bright as Grey's are. If you are considering a Grey, and you have not already, read Alex and Me. Grey's are considered by most to be the smartest parrot. Would I love one? Yes. Can I have one? No way in ****. I say that because I know I do not have the time for one.
When I had Teddy, he needed 3-4 hours of interaction every day, day in and day out. He was happiest when I was home ALL DAY. If I went out for even a few hours, this resulted in screaming and destruction. The first time this happened, the police came. They got a call from a neighbor who thought that someone was being seriously injured.
His cage had to be padlocked, otherwise he opened it at will. Even with the padlock, he had a tendency to distract me (by spilling or breaking something), and steal one of the keys. He would then hide it inside of his cage VERY quickly. I would put in away for the night, or so I could go to school, and as soon as I either (a) went to sleep or (b) left for school, he would let himself out. To say that was a problem is putting it lightly.
One time, I went away for the night. When I came home, he had torn a photo frame with 4 photos off of the wall, and shredded the photos of me. No one else, and no other parts of the photos in the frame. Just my pictures.
He would also get upset for no apparent reason (although I am sure there was one, again, he was a rescue), and he would bite. He left scars. He also would get scared from time to time, and when that happened, I ended up with puncture wounds on my arm, where he was standing.
You cannot plan on having a Grey and going on vacation. Can you leave for a night or two? Yes. Not several days.
Not ever.
I hesitate to say this, but it is true; a very many of the intelligent birds that are kept in the home become so bored and depressed that they self-mutilate. There is nothing worse than watching a bird bleed from pulling its feathers out from boredom and unhappiness, or even worse, watching the bird go insane. The parrots are capable of it.
P.S Don't plan on having kids if you buy a Grey. They do not like competition for your affection.