Ash whether you get 2 males, 2 females or 1 male & 1 female - it really is a priority that they are neutered / speyed if they are to live together. What ever combination - they will almost always end up fighting as their hormones start to rage - if not breeding (male / female) :?
It is better all round for you & for the bunsters if they are neutered / speyed - in all honesty you would be better to take everyone's advice on here & get a pair from a rescue that are already neutered / speyed & bonded. Otherwise your parents will have to pay for the ops or you will potentially end up with very unhappy & potentially injured bunnies. I don't want to put you off, as owning bunnies is wonderful, but please, please make sure you know what you are getting yourself into & ensure you are able to do the right thing by them :?