go to sams club. they have a pretty vast selection and extremely reasonable. i just purchased a set of dunlops for my super duty. make sure you get e-rated for that truck. it boils down to comfort, road conditions and the amount you want to spend.
Yeah definitely want E rated. What has pissed me off in the past about Sams, is that I don't always maintain my membership. If later I want to have the tires rebalanced, I need their damm membership card just to have the tires balanced.