There are so many remarkable improvement on the NAV system.
1- Background color schemes can be changed to 4 different color combinations & background depending on what is pleasing to your senses.
2- The points of interest have been improved. In 2003, the NAV had about 540,000 points of interest. The new generation NAV 4 now have OVER 2 MILLION points of interest. If you want to go to nearest ATM, gas station, bank, hospital, police station, dealer, park, museum, city or federal building, auto supply store, grocery, general stores, department stores, retail stores, convenience stores, community center, ice cream parlors, pet supply stores, etc.,or your favorite restuarant. U can even chose if U want Italian, Japanese, Chinese, Korean. American, fast food. U can even call ahead of time to order your dish via connection with your BT enabled phone. The phone numbers to all these points of interest (POI) are all programed into this new generation NAV 4.
Look at your Yellow Pages, if it is listed in your local yellow pages, for sure it will be in your new generation NAV 4.
You can even input the name of the place you are looking for & your NAV 4 will find it for you.
3- The NAV direction/map system will let you chose which route you want: shortest, city route, or highway route, it will even let you chose if you want a scenic route.
Of course, the best choice for an LS is now the 2004 LS430. It is now the question of how much you are willing to pay and how much you can afford.
Then again most Lexus buyers are sensible and value oriented people.
That is why we did not buy the over priced BMW 745i/iL or the Mercedes Benz S series. Afterall they were all rated behind the 2004 Lexus LS430.