Got the King Coilovers and Toyo Open Country AT 285/75R18 installed. The installer told me to expect the ride to be stiff until the springs set themselves. Actually, I think the ride is great -- somewhat firm and controlled -- like my M3. However, the truck does "pogo" a little when coming to a rest. I recall reading about this from another board and is expected from the Kings.
I plan to install 4.53 gears, but the larger tires have not impacted the performance much at least without a load. The speedo is off a little, but I have a GPS that reads my speed. Stopping distances do not seem to be effected too much, but I have been careful. I do notice a little more sidewall flex when corner due to the taller sidewalls than the stock tires.
The truck is noticeably taller, but it's not obtrusive like most lifted trucks.
I'll get some pics up soon.
2012 Toyota 4Runner Trail Edition
2012 BMW R1200GS Rallye