What nav system is the best and what should I get for my GS400? Alpine, Pioneer?? what model number?

 

Get the Kenwood Excelon. It is the only one that is touch screen with rendered graphics. You do have to buy the Screen separate. It is a DVD,TV,CD screen for around 2K. The Navaid is another 2,500 it will cost around 5K when your done. Lexus charges 4 I think for the Navaid package. I would rather have the DVD,TV,touchscreen myself for almost the same price. The screen lets you control the amp and CD changer that you may want to add on later. You will lose your sub woofer and the stock CD changer if you go with any other navaid besides the Lexus one.