Discovery 3 - What to watch out for?

Hi, I have an L322 2003 td6 which has thrown water into the oil, oil cooler being pressure tested as we speak, when it's fixed I'm going to look for a Disco 3 auto with 7 seats.

I've got 4 kids and the Rangies doesn't fit the bill any more, is there anything I should look out for? Forewarned is forearmed as the saying goes....