4:10 or 3:73 ?

The DW and I have begun talking about replacing the current 05 Duramax with a new truck. Question is another GM or the Ram, it won’t be a Ford. I get what yall are saying, at the 12k scaled weight that we are running I could get by with a SRW 6.4 Hemi. But we have a DRW diesel truck, and we don’t want less than we now have. I know that the Cummins with a 3:42 will pull this or even a larger trailer just fine. I also don’t need a DRW truck that cruises 80 MPH empty. I just don’t drive that fast. In this part of the country that will get you face time with a LEO, and that is something I try to avoid. Fact is I want a TV pull my trailer up to 65 MPH in comfort on cruise control. I rarely drive my current truck long distance or on the interstate not towing. I have other vehicles for that. So a truck that won’t shift into top gear below that speed towing does not make sense to me. So if a Ram with a Cummins and 4:10 gear tows it like it’s not there, it’s ok. I won’t come back and complain about having too much truck. And if we ever buy a larger trailer, I won't have to worry if I have enough truck.