which superduty truck to go with
 

I'm looking at some 2003-2007 Ford, Dodge, and Chevy/GM 2500's from North Texas Truck Stop most in the range of 100-130K miles or so. They have some very nice trucks. Can you please tell me which truck would be better to go with and why? I would like to get 150K-200K miles out of it. It would be pulling a horse trailer occasionally and pulling boat to the lake frequently. Any pros/cons for one over the other would be appreciated. I've never owned a truck before.