To be completely honest, the first thing to pop into my head was 'Druuna... definitely Druuna.'. But then, everyone I know will admit that my mind tends to shift toward the, umm, less polite topics of discussion.
So, if I could magically have the space (and not just because I'm married and have kids), I think I'd prefer to have a life-size replica of arguably the best character from 'Firefly'... the Serenity herself.
Lots of space... a great dining table; individual rooms for the kids, the in-law, and the wife and I; and who wouldn't want to have a chance to play in the cockpit or lounge about in Inara's shuttle paradise?
And I wouldn't get murdered with a frying pan because of my gut-response to the topic. Heheheh.