Thanks to all. I do appreciate your experience and input. I too appreciate the built-in features the factory units offer. I have been using a plug in Tom-Tom for a few years and like it and find it reasonably accurate. I hate to stick it in the window and have cables hanging all around. But I have lived with so far. The large screen of the factory unit is very nice. The backup camera is a nice and useful feature too. It seems that the built-in units have also faired well over the years because I see some of you have had them for years. That speaks a lot to me of their reliability. I think if I go for the new Lexus I will go in for the navigation also. Although I have been reading some not so positive remarks I have not seen any real negatives.
Bye-the-way, can any of you tell me if the new Lexus radios are I-Pod friendly ???? I don't remember seeing any input jack when I was looking around.
Thank you all. Your experience and comments are priceless.
Roger