Is it bad that I'll only be rooting for schools with Delta Chi chapters?
With his interests in government/politics and psychology/neuroscience I think he should definitely look at George Mason (my alma mater, I guess I'm all about bias today...).
DC seems like a great fit for his interests, and students at Mason are very involved in social justice and political action. Basketball is huge at Mason, and there are a lot of opportunities for school spirit involvement. It's an area the university actively encourages and the recent move to the Atlantic 10 is only going to mean more growth in that area. There's also an undergraduate major in game design, if he decides he wants to get into that again.
My sister is a psych major at Mason right now, so I'd be happy to pick her brain if he wants to know more about that. I'm also an Alumni Ambassador for the Office of Admissions so I'd be happy to chat at length if he decides to look at Mason.