Just make sure your family has the patience for the noise and the mess. I don't think greys will scream like our Macaw, the ones I have been around are more about talking and making goofy noises...ALL DAY LONG!
If you want him/her to be healthy, they are high-maintenance. If you ever need vet care, you'll just about need to take out a personal loan (That just may be our area.)
We feed pellets, seed mix, and we cut up vegetables every morning , the macaw also gets a few nuts. We make a mash to feed at night with oatmeal, spinach, broccoli, carrots, peanut butter to make it more yummy, sweet potatoe, etc. We make a big batch maybe once a month and freeze it in ice cube trays, then bag it. We just heat a couple of cubes up for them at night. It makes for some nice birds, when they have full bellys.
We don't have a grey, so not sure on toys, I know it is a realy pita to keep toys for our macaw, he is 1/2 beaver. To make it easier on ourselves, we hung a stainless bucket and fill it with wooden pieces from
www.caseyswood .com, he picks through his bucket taking out interesting things, putting them in his water, feeding them, destroying them , etc.
If you have the patience for the noise and the mess, then parrots are companions unlike any other animal.
Oh forgot to mention, no one has any allegies do they? Greys, like cockatoos are really dusty birds.