Toyota Tundra. The new Tundras are awesome trucks. I know I own a 2008 Tundra DC 4x4 5.7L. It hauls a**, blows away the competition. The Titans are overpriced and under built. Tons of rear axle and differential problems due to not using a larger axle and differential for a larger truck. The Tundra's have a lot better accessory package lineup, and more configurations.
Toyota's are far more reliable, and also hold their resale value better.
If you are seriously considering a Toyota Tundra goto
http://www.tundratalk.net and look at all the awesome trucks and forums.