This is my second LS430; the first was a 2004 model. I tried the ES 330 instead but missed the amenities of the LS and went back. The most striking difference relates to the improved documentation that comes with the '06. The '04 and '05 ES seems primitive by comparison. One can now actually find information and the description of how to do things now seems to be quite accurate. My only complaint is the reluctance to integrate a satellite radio completely. Leaving the placement to the judgement of the dealer does a disservice to the appearance of the vehicle if not done properly.
I have the sport suspension and was initially skeptical. Now I appreciate the value of this and liking it bettter every day.
Do something about integrating an antenna into the design of the vehicle rather leaving it to the imagination of the dealer. Some dealers still insist on an external mount atop the trunk deck with an exposed wire going underneath the forward lip of the trunk lid!