We have a Mazda MPV - we got it because we will need a car that fits 3 car seats along the back. It was pretty pricey, but its freakin awesome!!! It has sliding doors on both sides, so both kids are easy to get out. Plus its super easy to drive, and I even reverse park in it (and I can't reverse to save my life!!!)

And the best thing is that all the seats are removable (its a 7 seater car) so in case the kids are fighting, we can separate one down the very back, and then the others behind the front seats.. haha!!!

Oh - and it has independent vents down the back for air conditioning - apparently not many of the big vans have this? Dunno.

Good luck with your car shopping!!!