I test drove the GMs and bought Ford instead. Just a better product all around IMO. Although it doesn't drive like an X, it drives great for a heavy duty pickup and can pull or haul anything you throw at it. Now that diesel fuel is about $2.99 in SoCal, and premiun unleaded is $3.59, the diesel engine set up is really paying off too.

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'06 X5 4.8is, TiAg/black, cold weather pkg., comfort seats
'07 750Li, TiAg/black, sport pkg.
'05 Ford F350 silver met./slate gray, Lariat, 6.0 PSD, CC, DRW, FX4