one of our neighbours have peacocks...shortly after moving in to our house, i was surprised to find 8 of them pecking around in our garden, including a few white ones.
they make a lot of noise (seemingly at any time of day/night, especially if they are unexpectedly disturbed), and a great deal of mess. i have also heard (although not witnessed it yet) that they can make quite a mess of shiny cars, but climbing up on them with their sharp claws, and sometimes attacking their own reflections.
they do look amazing when displaying, though.
perhaps a nice idea if you have >10 acres of land, and they are far away from any bedrooms/cars!