Is a 2005-2007 ford mustang expensive to maintain and is it good in the winter?

does it need alot of maintenence and is it expensive to to maintain? anyone with mustang before with experience. also i live in toronto and we usualy get snow in the winter and i am going to get a RWD car (coupe) whether it is going to be a rx-8, mustang or any sports car, so my question is, is the mustang good in the snow for a RWD car since it is heavy (if it has good winter tires). please tell me about the maintanence or give me forum links to this kind of info because i need to decide which car to get soon