Check out http://www.ExpeditionPortal.com
if you want some more "overland" rig ideas.
I was just at Overland Expo in Flagstaff, AZ a few weekends ago.... saw some awesome rigs. One that really stuck out with me is the 4x4 Isuzu NPR style trucks with either a cab over slide in camper or even just a bumper pull camper off it's frame and onto the truck frame. Totally home build able and really versatile. I'd say the only big draw back would be the standard cab and possibly not being able to access the camper while driving. But that could probably be over come.
For our overland travel we base camp the 36' bus in the forest and take our Land Rover into the bush for extended periods. (we've only done that twice now as we're still in the final stages of bus construction)Once the bus is finished we will be full timing in it. It works great for our lifestyle but kinda defeats the purpose of continued overland travel.
FE = Front Engine
We run a RE = Rear Engine. Not as much ground clearance overall but we keep it to the graded FS roads so it works fine for us.
Bottom line.... just get out there!!!
Tons to see and so little time.