Chinchilla, maybe. I have a few... they're very personable, cute, entertaining animals. They themselves don't have an odor, they don't really shed, make a lot of noise or cause a mess. They are higher maintenance, though (they require moderate interaction for them to remain social and friendly, they need to have hay and chews provided at all times, their bedding needs to be changed a minimum of once a week or that will create an odor, they can't be feed treats which we are prone to giving our animals, etc).
But I mean, after the appropriate research and you have everything set-up... they're fantastic pets. Long-lived though, 15+ years, so it's a real commitment (then again, so are a lot of the other suggestions).
Anyway, if you like the idea of them and/or hedgehogs check out chins-n-hedgies.com, great forum, they'll get you all the right info on either species.