many of us contiplated the mdx vs the x5 thing, and I was really really on the fence. if your comparing base model x5 to the loaded model mdx, I would go with the mdx, but if you want to spend extra money and get the features on the X that are not available on the mdx then dont change your mind.
there is another post on here of a member who has a x5 and wife jsut got the new mdx, and that is basically what he said, the mdx cannot compare to the x5. but 20k difference is huge, but was worht it to me, jsut dont tell my wife.
btw, the front of the mdx looks horrible, really horrible.
hope that helps some.

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M3