Get checked for rabbit allergies before you get one, too.
I am fine with cats and dogs. I am deathly allergic to bunnies. We found this out after my parents got me a bunny.
But yeah, they can be litter trained. You'll probably want two as a pair so they don't get lonely. You need to trim their claws, I think; if they don't have something to dig, their claws can get too long. Same thing with their teeth. If you aren't feeding them the bunny equivalent of a raw diet and you're going for rabbit food instead, make sure to give them some wood or something to chew on so they can keep their teeth whittled down.