 Purchased used w/4,000 miles, all options except DVD screen and heated rear seats.  Great performance and handling for such a large car.  Tested Lexus GS 430 and BMW 530 but M45 seemed much roomier in the back and quicker as well.  Love the soft leather and rosewood, even though Lexus still more refined inside.  Exterior styling also a little bland compared to E500 and GS 430.  Nice exhaust rumble that's not intrusive when cruising at highway speeds.  Glad I don't have sports suspension, supple ride that's only occasionally harsh over very large irregularities (especially if accelerating hard).  Rides a bit noisier than Lexus, but expected given sporty personality.