I wrote the "Great Car but Performance Lacking" review on 10/3/09. This is an update based on new info. In the prior review the RX350 and RX450h were both FWD. I went back and "put-the-pedal-to- the-metal" on the AWD versions of both cars. Only when "Eco-Mode" was turned off (RX450h only), RX450h acceleration from standstill was nearly as good as the RX350 - a significant improvement. The RX450h engine does roar at first as it seems to lag in realizing you want to lead-foot it. On the highway, there is no difference. With Eco-mode on, you cannot get away with such rude behavior. This mode was probably on in my first review. Also, realize that with Eco-mode off, mpg will be less.
Same as in previous review plus AWD handling is significantly better than FWD. Resale value of the RX450h 3-5 years from now should be higher as hybrids will be the norm (and gas prices will be higher).
Imitate Infiniti's exterior and interior color schemes.