Buck or Doe?

[lostmountain]

We are getting two Holland Lops and are planning to house train them as well as giving them outside yard time. We will definitely spay or neuter. Should we get a buck/buck pair, doe/doe pair, or buck/doe pair?

 

[FutureChickenMan]

doe/doe preferably siblings. separate cages for inside, they can play together but really need their own "space".