80 series is the last SFA Land Cruiser before IFS. If you are going to get IFS then many vehicles will fit your needs Montero, Trooper, 4 Runner, Pathfinder, Armada, FJ Cruiser etc. Land Cruisers are beasts of a vehicle but comparing a 80 to 100 is like comparing apples to vegetables. They are just totally different vehicles. Might as well get a Sequoia or FJ Cruiser if you are settling for IFS. Lots of other IFS vehicles out there that have more power same reliability cheaper and more or equal cargo space compared to the 100 series. Best advice is drive the two of them and see way you like best. To me the 100 series feels like a mini-van. The thick wide doors and interior design give it that fat bloated feel. The 80 series is a unique last SFA full size SUV that has a legendary reputation around the world. Extremely reliable, tons of aftermarket support, and very little issues that are all well documented. The 80 series is easier to lift/mod and has an awesome commanding drivers view. I think they are both great vehicles but for me I would take a more robust SFA vehicle over IFS any day. You buy a Toyota for reliability and durability if you want comfort and looks you get a Land Rover.
Roads? Where we're going, we don't need roads...