Drive an X5 with sport suspension, then one without. You decide.
I got the Sport Package because I like the options in the package, and I'm not worried about getting 20- or 21-inch wheels, and I'm not worried about adaptive drive (others are, not me). I have my sporty 535i (sport package with Dinan upgrades) for fun. For more fun I have a 318ti that I autocross. A 5300-pound SAV doesn't have to have a sporty drive. It can do it's best, and being a BMW with great suspension helps, but it's still 2.5 tons of SUV.

Another good note about the sport package: you get sport seats (more support at thighs and bolsters).

Let us know what you decide.

(P.S. If it was in our budget, I would get the Adaptive Drive as well. But I was faced with the either/or situation, and I chose ZAP.)

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*2010 X5d - Space Gray/Black Nevada/Dark Bamboo|ZPP|ZAP|ZCW|ZTP|ZRC|322|328|386|4NC|4UB|655 |6FL
~Ordered 8/27; Production began 9/28 at 12:20pm; Completed 10/7; Delivered 11/4!~
*2008 535i Black/Black - Dinan Exhaust & S2 Software
*1995 318ti Clubsport - Hellrot Red (autocross/fun car!)
Past: 2005 X3 3.0i; 2009 335xi