Teams like Fiorentina and Lazio will always be up there in TOP7 with occasional TOP3 finish, but they don't have enough resources to improve beyond that, at least not yet. It'd be glorious for them if for once they stopped choking in CL preliminaries.
Inter, Napoli and Roma are all capable of challenging us next season, but I'd say Inter has the best chances, considering they have much bigger transfer kitty than the other two. As for Milan, it's probably a long term project that might reap it's rewards in 2-3 years if they manage to keep Montella, their young talents and add quality players instead of the garbage they have now. It's a big if, considering that atm they are changing their owners from Berlusconi to imaginary Chinese investors