The ABS alone will keep you from skidding on wet if you have to jam the brakes, and it will also stop you faster than you could with manual brakes. The capper in the safety department is infrared night vision, available only on the Caddy. Using military technology, the night vision system keys on heat, and shows you a ghostly white image on the windshield of any heat source. You can see potential hazards five times farther away than with low-beam headlights. The things that show up most on cars are the wheels and exhaust pipes.
People are recognizable, as are small animals.
The system takes some getting used to, but it works. If you go up to the DTS, your 4.6 will give you 300 ponies. The LS 430 only has one trim, with a 4.3-liter V8 that turns out 290 horses. However, the Lex produces 320 pounds of torque, versus the DTS's 295 pounds. Probably not that much.