Consult Consumer Reports at your library. Usually near the end of the year they'll have a used vehicle edition as well as a small CR Buying Guide book for subscribers. They maintain fairly detailed/compiled subjective data as related by owners. According to the 2013 edition that looks back to '06 and newer, the '07 rated a bit better than '08, fwiw.
As a Nissan Frontier ('00 / 4cyl / 5sp) owner, I couldn't be more impressed with my truck. It has been a rock. Over 160K with only an alternator and the brakes both replaced once. Still on original clutch.