I have been a nanny and I love kids so while I don't have any of my own, I do have a whopping 11 Godchildren and a great nephew, all of who I usually see on a weekly basis. I have a minivan with 5 carseats in it!!
The leather seats are the most important feature. It costs more, but they wipe clean incredibly easily and you don't have to worry about spillage of drinks as much.
I also love my automatic doors. Makes it easy to load the kiddos all in the vehicle and also open the door while carrying one and holding one's hands. The automatic doors are also a Godsend for loading the groceries.
The middle row bucket seats to walk in between is harder said then done because bumping one's head on the ceiling happens more often then my head would like! The stow and go seats are great because if you only have 4 kids that need to be in the back, you can fold one of the seats down in the middle, making it much easier to buckle the car seats in the back row.
The stow and go seats does allow for one to become a pack rat in the car. I tend to carry everything but the kitchen seat around with me so be aware that is a potential problem unless you are an organized person.
I have a dvd player in mine and love it long car drives. While I love talking to the kiddos, sometimes its nice to put the dvd on and get to talk to the adult (or older kid) in the front seat without interruptions!
Do note in the town and country, there are only latch systems for 2 of the three seats in the back so while you can fit 3 car seats (depending on variety...I can get 2 backless boosters and a fwd facing carseat back there), only 2 can be latched.
Hope that helps...