I am on the verge of buying a 2.5L, X3- which I loved test driving.  Then the US Gov't report on SUVs and roll overs came out.  The X5 did reasonably well.  Too soon for reports on the X3.  But I witnessed the most horrific accident last week on the highway btwn a car, truck and SUV and the SUV (an American model)  flipped a few times and skidded down the highway on it's roof.  Bit nerve-wracking.