I would buy a piebald pair, and some wild colorations to mix in with them later, like Killer Bee or Lemon Blast.

Granted, I would need a pair of opposite sex Killer Bee or Lemon Blasts and a pair of opposite sex Piebalds, just to increase my possibilities. So I could hatch a Killer Bee Piebald or Lemon Blast Piebald in around two or three years.