I am also in the position for the last 16 months and after careful research, I decided to leave my 3 year old in the middle and put the baby on the drivers side, where I can get her in & out easier. My 3 year old can climb to the middle). The reason for this positioning is research that I looked at said if you are in a position to avoid an accident, your instinct is to turn away (from driver's position), so the most dangerous side of the car is the passenger side, also more cars are t-boned on passenger side due to driver's reduced visibility. It still bothers me too, to have one so close to the door. One site I went to even called the passenger seats "the death wish seat"! I checked on carseat websites as well as BabyCenter & Baby Zone. Good Luck!