Well, You got Ohio State, University of Florida, PennState, UCLA, University of Michigan, Illinois-Urbana and the list goes on as mega AAU Universities which have great academic/research reputation. We share the research intensive similarities with these universities. We shouldn't be afraid to grow. I wouldn't like the enrollment to be 40k+ but I think somewhere around the 30k should be the goal
However, as you pointed out, we can succeed in athletics with the current amount of students.