I have a '95 GMC Suburban 4x4. I was looking for towing capacity (3500 lb boat) and seating & luggage for 5. The 'burban has plenty of towing power even when loaded, a class III receiver, seating for 8, as Bryan said, space, space, space, not to mention 8 cup holders!
The quality has been OK, not great, but OK. Since it is based on the standard GM pickup design with the 5.7L (350) V8, parts are cheap and plentiful, and will be around a long time. I have 110,000 miles on it, I will run it into the ground, hopefully getting another 100,000+ miles on it in the next 7 years.