I agree with everyone about finding a model with the stow-and-go seatings, as well as the sliding doors. In fact, I love that my sliding doors and my back bay door are automated.
I purchased our minivan at the end of 2006 and went back and forth between the Toyota Sienna and Honda Odyssey (both were the top rated minivans by Consumer Reports for safety and repair history.) I selected the Sienna because it was closest in look and feel to the more luxurious car I had been driving. (Ahhh...the days before children...!)
However, if you are planning on having three car seats in the van at one time, the Sienna can't take three car seats in the second row -- one would have to be placed in the back row. The Odyssey can take three car seats across the second row. However, I've got two car seats and they sit extremely well in the Sienna. I love our Sienna!!
PS: I did not want a DVD player. The last thing I need is a fight with two toddlers over putting in a movie for my 2 minute ride to the grocery store. Someday when we start taking long car trips, we will buy portable DVD players to bring along!