We have a 2006 Ford Crown Victoria. Massive car, tons of legroom front and back, we can fit three of anything across the back seat with no problems at all. Massive and deep trunk too. We took an almost three week road trip in September, well over 5000 kilometres, had no problems at all fitting in all the luggage.
We bought it for $3000 (a former used police car) and it's a great practical family car; rubber floor instead of carpet, cloth seats for the parents up front but vinyl in the back for the kids. Auto insurance is also as cheap as it gets. Fuel economy is not the best but it is a full size sedan after all and the insurance savings make up for it (where we live anyways).