Location?

I have two bunnies right now, one male and one female. I am hoping to get them spayed and neutered soon. In the past they have lived out side. This winter I convinced my parents to let me bring them inside, and I made them both C&C cages. For my birthday (which is coming up) I am going to ask them if I can keep the bunnies inside. (My dad said they would have to go back out side after the winter before). But now I have the problem of where to put their cage if they get to stay inside. I have them in the basement right now, but I would like for them to live upstairs. My problem is that I would not be able to fit a good size cage in my room, and really the only other place that I could put it would be in the attic or the basement. The attic is REALLY big and sort of finished and it is a walk up so there are stairs up to it. But the problem with it up there is that it gets really hot. So what should I do put the cage in my room, the basement, or the attic?