Actually when we first considered our Alaska to Argentina trip we considered a Land Cruiser with roof top tent but very soon realized that would not be a good decision for the Americas. So had to look at other options.
We seriously considered the Tundra and also the Ford 150 and the Nissan Titan. All trucks we considered were clearly capable of doing an Alaska to Argentina overland trip. So it came down to the best deal. The Nissan Titan had the best stock off road package, so we did not have to incur extra cost to enhance off road capabilities. It had the largest payload of the 3 trucks. It met all our criteria. It was also most affordable. Having now completed our trip we can say, "It was the right decision."
The Nissan Titan has 2 small design features that irritated us. The central console opens up towards the driver so when the passenger is trying to get something out of the console it is pain. It is driver friendly but not passenger friendly. When opening any of the truck doors the cargo bed lights came on automatically, this draws a strong current from the battery (5amps) which can drain a battery in a couple of hours if not switched off. There is no easy way of permanently switching off this automatic feature.
Yes we considered other pop up campers including the Four Wheel Camper. We visited owners of both FWC and Outfitters. We were in contact with both manufacturers.
The FWC interior design was not as functional as the Outfitter in meeting our needs. We wanted some small modification done based on our African overland experience. FWC told us they were unable to meet our needs whereas the Outfitter worked closely with us to modify the camper to fully meet our needs.
Our research was all done in 2009 and things may have changed since then with regards to both trucks and campers. If we were starting from scratch we do the same research ask the same questions to dealers and manufacturers as products change.
Below is a link to a write up we did on Expo Portal about choosing the truck.
http://www.expeditionportal.com/vehicules/57-nissan/311-nissan-titan-as-an-expedition-vehicle.html
We will add some photos of the inside of our camper when it arrives back in Canada, showing some of the mods we did.