I test drove both, and even though I was very impressed with the MDX, I chose the X5 3.0.

So much more elegant!!!

The MDX has the lead in technology, far superior Nav, voice commands work far better, superior rear camera, etc.

MDX does not offer Comfort Access, and does not have the same overly backup features that X5 offers. In the end, I thought the MDX was ugly...the dash has way too many buttons, and even though the technology was far easier to use and superior in most every aspect. The X5 was far more elegant and understated. I felt like a million bucks in the X5....didnt get that feeling in the MDX.

I love my X5...it is my first experience with BMW.

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2013 X5 35i M Sport