Thanks for the warm welcome!
As far as the size, we know that the full size Tahoe will be bigger from a sheer size perspective. It has superior ground clearance, and possibly more interior volume. We are really more concerned with finding a vehicle with four doors, AWD, good power, and WAY better gas mileage. So long as the rear cargo area has more room in the back than, say, a new Dodge Dart, I think it should suit our needs.
Plus, the Dart doesn't have an AWD option.
Did you order your DJ SXT with the 2.4, or the 3.6? Also, does anyone know if the 2013s are available with the 8 speed transmission yet?