We've had a Ford Excursion, GMC Yukon XL, Toyota Sienna, and now Honda Odyssey.
All of them seated 8 passengers and had plenty of room for cargo.
Ford: HUGE vehicle. Plenty of space and power to do whatever you want. My wife had problems maneuvering the car in parking lots. Gas mileage was HORRIFIC.
GMC: Large vehicle. Plenty of space and power. Easier to handle. Gas mileage better than the Ford but not great. Had engine trouble at 115K.
Toyota: Large enough. Good trunk space. Easy to drive (great turn radius). Good gas mileage.
Honda: Same as Toyota.
Out of the vehicles...I probably liked the Toyota the best but the Honda is almost as good (despite the stigma of having to drive around in a van).