Buying an E70

[MONAX]

Hello!
I am a proud owner of a 2002 X5 (E53) with 70K original miles. I am currently selling it and want to upgrade to an E70. My budget is right at $30K for the E70, judging from what's out there I have seen a few 2007 E70 with low mileage that are good candidates. But before I pull any triggers, I wanted to check in with the experts and get your opinions on what I should be looking for on 2007 E70s that go and test drive. What are the "prone to failure" areas of the E70s (I know my list of the prone to fail for the E53) and any recommendations/advice is always welcomed.

Thank you for your help.
MONAX