We are considering adopting 8 w/o sibling kittens from the local Humane Society. one is male, one is female. We are considering two kittens so that, besides the early handling and all things that may enhance a kitten's early development, they can keep one another company. They would be indoor cats. I have never had more than one cat and currently do not have a cat. I am looking for suggestions, pros, cons, etc on rearing sibling kittens.

would i need 2 litter boxes, 2 feeding bowls? Once they are both fixed do i need to worry about the fact they are opposite sex?

They would be indoor cats. not declawed. and well loved. your advice would be great and much appreciated. thank you.