What is the best full sized SUV?

I need a full sized SUV that seats at least 7 (8 would be preferred). I need plenty of cargo room behind the third seat(we will frequently have a double stroller and multiple large suitcases, amongst other things back there), and don't want on that has no leg room in the third row. I also need a DVD system in it. I don't want to go older than a 2006, but will but a used one. My price range is no more than $20,000. Any suggestions on models to check out, or ones to avoid?