Please try and avoid the "none of them" comments 
The contenders are:
Range Rover Sport
M class Merc
X5 BMW
Or another Cayenne but this time a face lift 2007 on version. (iv got a 2006 one now)
All the cars will be 18-24 months old and the petrol derivatives.

The contenders are:
Range Rover Sport
M class Merc
X5 BMW
Or another Cayenne but this time a face lift 2007 on version. (iv got a 2006 one now)
All the cars will be 18-24 months old and the petrol derivatives.