If you want to use it for wildlife I would prefer as long a lens as possible.
I have a nikkor 70-300mm and sometimes even 300mm is not enough.
I would prefer more light sensitive lenses too but if 200mm doesnt come close enough whats the point of having it. trust me you regret buying 200mm for wildlife and zoo photography. You need 300mm range (most wild life/zoo shots i make are over the 200mm range).
At F5.6 300mm you can achieve decent bokeh anyways. Below photo was made at F5.3 at 195mm with my 70-300mm VREDGII (or whatever its called, to many letters in the name).