I'd say, the wisest choice will be the Grippen or the F-16.
Don't think the Super bug (F-18E/F) will solve your problems. It is called the "Super bug" by the US Navy pilots for a thing. It is buggy. Less maneuverable than the F/A-18C, lost most of F/A-18s' aerodynamic goodness, bigger than F/A-18s, completely different than the rest of F/A-18s (unlike F-16's variants), slower acceleration than the F/A-18s. But they carry better electronics and more bombs. Yeah, it is for invasion-minded forces, who will just need to bully their way in an air space without fighting for air superiority.