You really wont know what your truck and trailer weigh until you get them on a scale loaded with fuel. You definitely need a 3500 SRW at the very minimum, but you will be living on the edge of payload capacity most likely. A dually will give you more breathing room on payload. They are also more stable in high winds etc...although a 5ver in general is more stable vs a bumper pull. I was really surprised at how much more "planted" the DRW truck felt over the 3500 SRW I had previously.
Get a Dually and you never have to worry - buy right the first time. I see people who pull similar trailers with SRW trucks and sooner or later they realize they needed a DRW truck.
You always want more truck than you need...
Now as for what Brand, that's subjective to your preference really. I will say that I have owned a 2022 F350 DRW, 2024 Chevy DRW(actually went thru 3), and Ram 3500 DRW.
The Ford was nice, (towed very well, smooth)however the interior had a lot of rattles the dealer could never fix. Also the front doors flexed on bumpy roads - to the point it sound like metal on metal and one time my wife sad it was so bad she saw daylight between the body and door when it flexed. This problem was worse when towing.
The Chevy 3500 DRW trucks also towed very well and I liked the new L5P Duramax. The main issue was quality control. We had failures in the following components with less than 500 miles on 3 trucks:
- Intermediate Shaft failures (all 3 trucks)
- Front Drive Shaft failure (1 truck)
- front wheel hub extensions - run out was so bad you would get vibrations on the freeway( 2 out of the 3)
I have always had Ram trucks and that what I went back to - of course you can find people on the forums who have issue. They all have issues but I feel its a very low number vs what's sold on those 3 brands.
I did like the 10 speed trans in the Chevy and Ford, however, I don't think it really was enough of a difference to stay with those trucks vs the 6 speed AISIN trans in the Ram I have.
Now the 2025 Rams will have an 8 speed ZF trans(no more 68RFE or AISIN) and all come with one variant of the Cummins, no more Standard Output or High output. So that may be something to consider. You can still get the Hemi 6.4 in the 2500's. On the 2024 Rams you can find some good deals right now as they are trying to clear them off the lots.