Grandpa, as you know I have a 2004 F-350 powerstroke and am quite satisfied with it. But saying that , I have a friend with a Chevy duramax and he loves it too, it does have a few more gadgets than mine too. My truck is the King Ranch model so it does have upgraded features like better leather, heated seats, etc.
I would say that they are all good trucks and the best thing to do is to drive them all and then make your mind up with feel of the drive train and creature comforts.
Hope to see you next season in the new boat. Hopefully I can get the motor in shape without having to invest in a new one, not quite ready for that. BIG BUCKS!!

Steve
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C/R > A good thing > fish all day,into the night! Steve Ng

Dad, think that if I practice hard, they'll let me participate in the SRC ?
[Gig Harbor Puget Sound Anglers....Join your local chapter. CCA member