My buddys parents just bought a '03 Lexus LS430 with the ultraluxory package.. navigation, rear seats that heat/recline/vibrate.. front seats that heat and cool etc... Navigation is on my list of must haves... but I'm not sure what screen would fit the best, I have seen some sick custom jobs done on here but is there any navigation ready touch screen out there that would be installable right out of the box like a new head unit? *with the right harness' etc.*