When it comes to towing, Bigger IS Better:)
If you can swing the money, you'll be happier with a 'Burb or the Expedition, but check the towing capacities of all of them.
Some folks love using vans instead of SUVs, because of the added room inside, but you'll need one of the "350"s
Will the smaller SUV handle the trailer? Maybe, and there are plenty of people out there that would be willing to tow a 26' TT behind a Geo Tracker:S So, take it for what it's worth....get as much TV as you can, you'll be glad you did.