I recommend a cat for a condo. I have a cocktail, lab and some cichlids now. I have had rodents, parrot (till my roommate shot it and fed it to my African rock python) cats, dogs and various rodents and rabbits. Even if you de-sent ferrets they stink like hell. I dont really recomend any of my past "exotics" they all have drawbacks.
If you really want an exotic get an African Savannah cat. They look great and are cool cats. Plus women are not scared of them like they will be for most other exotics.
African Serval Cat
