carbine, I'm not sure if anyone has clearly addressed this but I am concerned you cannot comfortably tow the TTs you want with your tow vehicle.
I had the disadvantage of needing to buy a tow vehicle, but as it turned out that may have been an advantage. As I did my (months and years of) research, I learned about tow ratings and payload ratings, and driving with ease vs 'white-knuckling' it. I realized that SUVs and half-tons, while capable at their limits with smaller trailers, could be more challenging in the moutains or if the trailer weight was near the limit. And I decided I didn't want to have that experience. At the end of the day I decided to go with the biggest tow vehicle I thought I would ever need, and now have a 2017 RAM 3500 megacab on order, with a Cummins turbodiesel and an AISIN transmission. Bottom line, no trailer is going to stop me now.
So back to your vehicle. It's true that you will be able to pull a good sized TT, if you just look at tow rating. But payload is going to be your limiting factor. Your payload is 1520 and I believe that excludes 150 lb for the driver, but not sure. To that add all the gear in your truck itself - passengers, food, clothing, etc. If you're bringing a deer home from the field you gotta throw that in, too. What's left is what's left for your trailer. Add 12-15% of the fully loaded ("wet") trailer weight for the tongue weight and that goes against your payload, too. When you run these numbers I think you'll see a 7000 lb wet TT is really going to cut it close. 14% of that is 1000 lb. That leaves you 520 lb for passengers, food, clothing, gear, extra fuel, supplies, firewood, etc. I think that's doable but awfully close, just judging by the way we car camp. And that's leaving no margin for error.
By the way I am looking for almost exactly the same trailer as you: 25', bunk model, more heavy duty for national forest, BLM boondocking, etc. Like you I have narrowed things down to Arctic Fox, Nash, and ORV; and possibly Lance (model 2185). These are quality models with well-built chassis and true four season ratings, according to most. They tend to be more expensive but like you I want mine to last 8-10 years or more. I haven't seen any other brands to get excited about for this purpose.
Now understand I am far from an expert. I have not yet towed a trailer of any kind! But My tendency to analyze and overanalyze and to research things to death did educate me, and led me to conclude that a half-ton truck would not be a good fit for the long run for the kind of towing I want to do. A 3/4 would have been ok but I decided to go fully monty and be prepared for any future tow job I wanted to do.
All this to say you might need to look for the smallest, lightest versions of the kind of trailer you're looking at to make sure you have an ideal towing experience. I cannot see going heavier than 7000 lb unless you always plan to travel solo..