Have you considered a Ford F-150? It is known to out perform the competition.
I have looked at them.  They are what I was leaning to.  Have you heard about the 3.5 liter twin turbo engine?  What are your thoughts if so?
I would steer clear of that. They had some lawsuits due to defect, What else are you considering?
I was also looking at the Toyota Tundra but the gas mileage is horrible.  The Silverado doesn't have as much towing capacity.  I am not sure.
Between the Tundra and The F150, the F150 is superior in terms of towing, payload, engine options, and interior comfort.
I agree.  So what engine should I go for in the F-150
You have six engine options. Do you think a V6 is powerful enough for your needs?
I need over 11,000 lbs of towing capacity.  I don't know for sure.
The Silverado HD has major towing capacity. Some refer to it as the Big Dog!
I can look in to that I guess.  It won't hurt!!