We have a 2013 320 BHDS LE. Turned 1 year old this past September.
We have every option that was available when ours was built, but some of the new options would be very nice to have. Primarily the 50 amp service. A second A/C was not an option last time I checked, I wonder if that was a dealer install? Anyway - I would probably do it, though our single 15K unit keeps up in 100 plus heat, it just runs pretty much non-stop. Whatever package has the flush mount windows, I would do that.
I see you have decided on a 3/4 truck. Good choice. I have posted my actual scale numbers in several threads from when we picked ours up. They are heavy.
I started towing a diesel Excursion. Mine was nicely built. However, I was never truly happy towing with it because of the leaf sprung front end (all 4x4 Ex's are leafs front and rear.) I changed to an 05 F250 and it so much easier to pull the trailer now.
I also use the Reese dual cam set-up. I really like it. I have pulled in some pretty nasty conditions and always felt secure.
here is a thread about my scale weights. I am over 9K with full provisions for a week of camping.
scale weights, wd setup