Which Denver neighborhoods should a young middle class family (fairly close to DIA) check out?

I would suggest Reunion. It's a rather new area and has a great rec center and family feel to it. It's very close to DIA and would be the perfect location for someone who worked at DIA or traveled frequently. The one drawback to Reunion is it lies off of Tower Road, which is in desperate need of being widened.

There is also Green Valley Ranch which is within close proximity to the airport. The homes aren't quite as nice or as new as they are in Reunion, but the price tag is cheaper as well.