Some have rear air and 3rd row seating which might be occasionally useful since you have kids.

I don't think any of the e70s have front and rear air suspension though.

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e70 - purchased 6/2018
e36 - wouldn't pass smog at 190k 2016
e53 - transmission blew at 225k 2012
e30 - sold as it was a little slow for a DD and burning oil at 220k 2011