My '05 Duramaz has given me over 180,000 trouble free miles. Just about all of it towing or hauling something. I've been using it for our work truck for the past month because our '03 Ford F350 with a 6.0 diesel has blown head gaskets at 140,000 miles. The estimate to repair it, with all the other known issues is over $8,000.
I think you've answered your own question. You know Ford diesels had serious problems and you don't like the Dodge cab. Sounds like you want a GM. I highly recommend them. I've had 4 different ones over the last 12 years. They were all hard used work trucks and hardly gave very very few problems.