FORDS SUCK. (and i use to be a die hard ford fan) i have more than 50 F250's, F350's, F450's, F550's, and even some F650's(talking about a rough ridding, weak pcs of s*^$) in my fleet and yet to get one past 50,000 miles without major problems. If we did not have a contract with ford for almost 20 years we would not buy anymore! they are so bad we bought some v10's until ford gets a diesel that will last.
I own a duramax and love it. plenty of power and it's quiet! (for a diesel)