I would just get an X5 that comes with the M-Sport pack and be done with it. It comes with a lot of extra features including the M-suspension...

M Sport package.

The optional M Sport package accentuates the dynamic character of the BMW X5. Bumper and running boards in body color as well as entry sills with the M logo are only the first in a long line of powerful and sporting impressions.

Not even the wind can resist it: A front apron with larger air inlets, side sills with an additional light strip and a rear apron with diffusor optimize the pressure on the rear axle at high vehicle speeds. Even more sportiness is provided by the Adaptive M suspension (containing Dynamic Damping Control and air suspension) and the 19” M Double-spoke style 467 M light-alloy wheels with mixed tires. Alternatively, the M Sport package can also contain 20” M Double-spoke style 469 light-alloy wheels.

The new-generation M multifunction leather steering wheel not only sits perfectly in the driver’s hand, but also offers comfortable gear changes thanks to the shift paddles. Sport seats in Alcantara/leather with the M logo offer optimum stability even for the sportiest driving styles. The interior is rounded off by top-quality interior trim strips in Aluminium Hexagon, the M footrest, M entry sills and the BMW Individual headliner in Anthracite.

Cost: $6,500

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LEV
2011 X5 xDrive50 Black/black////M sport pack/all options
2006 ///M3 Cabrio Gone but not forgotten
2003.5 ///M3 Gone but not forgotten
2007 Aston Martin V8V Gone but not forgotten
2007 Porsche turbo Gone but not forgotten
1995 540i M-sport(1 of 70) Gone but not forgotten