I have driven many suv's out there and the Armada is the smoothest for it's size. With all the features that come with this truck, why pay for a Toyota Sequoia with little to no options? The mileage for city driving would be the issue I would have a complaint with.
Nice horsepower and ride. The back up sensor can not be beatin as a saftey concern for anyone with kids or pets.
Milage for the city. Maybe tweak the heads for improving the air to fuel mixture.