I currently have an 09 Ram 2500 hemi, and have also contemplated downsizing. Here's what I would do:
1. Find an early 3rd gen 1/2 ton QCSB with the hemi and manual shift t-case
2. decked cargo system and low pro camper shell
3. Power wagon skids (there is an article on this online somewhere, need an extra trans cross member)
4. Swap to a Durango t-case that allows full time 4x4 (NP242 IIRC?)
5. Rear traction aid (true track maybe, selectable maybe), and gears maybe if necessary
6. maybe a level kit
7. Cooper Discoverer AT3's
8. front reciever/portable winch (wired front/rear)
I think this rig would be awesome in any on-road type weather and also handle many off-road stuff where a newer full size truck is going to go. Plus storage for recovery gear and enclosed storage above the decked system for other gear/sleeping. It would also blend in, look stock, and not raise any eyebrows anywhere in the Americas.
The Durango full time case will go 2hi only if wanted for MPG's, and while it may have a slight strength disadvantage, I think that the true geared differential full time 4x4 would be a fair trade off for use in inclement weather. I have also found the discoverer AT3's to give great performance in snow, ice, rain, sand, and for an AT tire decent performance in the mud. Also quiet and comfy on the road.
I never have written this down, just been working on it in the back of my head. Now I kinda want to build it!