Need a opinion on 6.4 and heavy hauling

[Tomsf350]

Hi guys

Need a little advice, I'm doing a lot of houling (3 car trailer) and I'm looking into getting a newer truck. Right now I got a 2000 7.3l which been very good to me, but its getting a little old, loud and beat up, so I want something newer. I love the 08 fords, but I'm not sure about their reliability, since all I see on the road are those damn cummins trucks (not a big fan of dodge).
I was wondering if any of you use those things as true work horses and how they stand up to punishment of every day heavy houling (espacially auto transes). Any opinion would be apriaciated, thanks in advance