What Breed Of bird would be ideal?

I am looking for a smart, and fun breed of bird, one that will sing and talk, Not to nippy though. I was looking on petsmart.com and found the Conure breeds of birds, However i am interested in more variety of birds, like the umbrella cockatoo and parrots. Witch breed of brid would you suggest and why? Also what spices of that bird? Please remember, i am looking for A FUN & Talkative breed, that is smart and easy to train