I just turned in my 2003 M5 for this new 2006 M5. Surprisingly there is little in common between the two cars. The 2006 M5 is much more dynamic and exciting to drive. It outperforms the older model in every way, even in the 400hp mode. The new M5 is a blast to drive and I look forward to getting in the car every morning. The 2006 M5 has surpassed my expectations and I feel it is under-priced at 90K.
Speed, power, handling in a refined package. Bluetooth technology.
For price, the cup holders should be better. The navigation system is not as good as in japanese cars.