We just leased this 2008 X5 a couple of weeks ago and we are so happy with it! My wife had a 2002 X5 a while back and it was her "dream car". This X5 is 10 times the car the previous X5 was! BMW has certainly hit the mark on this X5. Beautiful design and the quality integrity is unmatched. BMW again has reminded me how great of a company they are. It's also very comforting to know that we are basically 100% percent covered with the BMW Maintenance / Service plan. That is such a nice perk!
The iDrive is quite nice. Quality of the interior & leather is impressive. Bluetooth is great for us handsfree people in California! This X5 has so many standard options it's hard to keep track of all the fun stuff it has to offer!
Better gas mileage by bringing the diesel option to the US. That's all I can think of.