Doing my homework paid off. I wanted the best luxury vehicle for the money and I found it with the LS 430. Smooth, powerful, quiet and comfortable are all great words to describe this car. Sitting at a stop light, you won't know the engine is running. At 70+ mph, the LS 430 glides down the highway. For my money, there is no option. Lexus clearly makes the best full size luxury sedan.
User-friendly Nav system; "you can hear a pin drop" quiet engine; roomy enough for a 6'5" driver; Levinson sound system is crystal clear.
Tighter suspension; slightly more backseat room; no real obvious flaws.