Some good points Savanah about what to expect in a $50K Lexus.
I, for one, have no rattles in either of my 2007 400h's. Perhaps I am lucky, or they made some running changes since 06.
The revised EPA figures on our cars are now City 27 and Highway 25. I get a fairly consistent 26 in both cars with a mix of city and local freeway driving. That's acceptable to me for the size, weight, and features of the cars.
I agree the the electronics could have been more inventive. My 94 BMW 740iL had a much more fun trip computer than our new RX's which are 13 years newer.
I agree that the engine/motor sounds under acceleration are very harse. Demonstrating the performance to passengers isn't high on my list for this reason.
I don't notice any significant wind noise.
I got lucky with Michelin tires on both RX's.
I"m not sure what interior lights you are referring to that don't turn off with the key. If you mean the reading lights, I don't know of any other cars that override the on position when the car is locked, although it's not a bad idea at all. I, too, have run down my battery by leaving these on overnight. It would be easier to notice if the interior lights didn't have a delayed turn-off.
Tom