You just have to pay attention to what you're talking about when you say "SUV".
That tag gets slapped on everything from unibody econobox compacts to Excursions that are 3/4 trucks with a roof over the bed.
If you specifically mean towing with a truck-chassis "SUV", they're fine.
I wouldn't use an SUV based on car drivetrain parts.
I also don't like towing trailers (other than 5th wheel or gooseneck) that are bigger and heavier than the truck pulling them. Some rainy day in a curve some screwy thing will happen and you'll see why.