SUV ideas for the wife

Mamma needs a new whip.

We have three kids young enough to still demand space. So fixed third row seating is a must. We haul lots of crap and do pretty long road trips. Towing is not an issue, I have my truck.
I really like the Nissan Armada but the bad ass V8 is useless to me and 18 MPG leaves me feeling thirsty. But that gives you an idea of the car Im looking for.

So my need are a largeish SUV with a V-6 and good mialage, 2-3 years old. Leather and E systrem. for 20K or less.

Thoughts?