I would love to see the information you have that shows the 200 series is "better" "stronger" built then the 100 series. Stuff like torsional rigidity, frame size, etc. trying to rationalize upgrading to a 200 series and strength of build is a top priority to me.
Google to the rescue: "2008 land cruiser frame torsional rigidity"
http://toyota4x4.eu/f/1199804242.pdf
"An all-new high strength, high-rigidity frame has been designed to accommodate
the body of the new Land Cruiser V8. The new frame’s torsional rigidity is 1.4
times stronger and its flexural rigidity is 1.2 times stronger than the
outgoing model."
http://www.trucktrend.com/roadtests/suv/163_0712_2008_toyota_land_cruiser/
"Although the physical size of the vehicle didn't change much, the frame is now fully boxed, with two of the rear hydroformed cross-members now thicker and stronger. Additionally, the frame rail cross-sections are larger. The result: Torsional rigidity increased by 40 percent."