Original LS400, aka Celsior in the JDM market. I read a fantastic book about the whole story written by an author that had unseen documents and interviewed some key figures involved during the developmental stage in the 1980s. I just love it's relentless attention to detail, the quality inside and out is exceptional, and the subtle exterior detailing holds many interesting features.
"The Japanese behemoth pumped more than $1 billion dollars into project F1. The F in this case stood not for "Formula" but for "Flagship." At its height, F1 employed 3700 of Toyota's top engineers, split into 24 engineering teams. They built 450 mules and 900 test engines and logged more than 1.5 million development miles -- incredible numbers, by any standard. Toyota bet that gasoline would once again be cheap and plentiful, so it started work on the F1's heart, a 4.0-liter, 32-valve V-8. Producing 250 horsepower and 260 lb-ft of torque, the engine was very potent by the standards of the day"
My favorite would be the 1997-8 facelift 2nd Gen complete redesign with the VVTi engine making the car good for a 0-60 sprint of 6 seconds flat. One quick barge.