Congrats on your upcoming insta-family! My sister, who has twins and another one on the way, went the mini-van route, and says it's really the only way to go. First, the doors are lower to the ground than an SUV's, and the doors open wider, allowing for more room to negotiate car seats, diaper bags, etc. Second, the seats are apparently easier to get to because you have an eisle between seats. She likes the captain seats in her van a lot. Third, there's just more room for other stuff, like groceries.
Hope this helps -
Nanon