I just got a BMW X5 3.0 and I can't say enough good things about it. My lease on a 2007 Mercedes GL is about to expire. I can't believe that for almost $20,000 less, BMW offers so much more! The biggest difference for our family is that the 3rd row is more accessible in the BMW. We have car seats installed on both sides in the 2nd row and the 3rd row in the GL was difficult to access. In the BMW, the entire seat can be lifted (even though the car seat is installed) to access the 3rd row.
Real time traffic integrated into nav, smoother suspension, split tailgate (things don't fall out of hatch upon opening), rear camera, bamboo wood accents (from a sustainable source).