Take it from someone that learned the hard way about babies and coupes. I had a 2000 Accord coupe when our first was born. By the time my daughter was big enough to ride in the 2nd stage child seat (the size that your son will be in before long) I needed to start bringing her home from daycare every day. The problem isn't so much getting the child in and out of the back seat. It's getting the child seat
into the car in the first place. The seat wouldn't fit through the door opening and behind either of the front seats. I suppose I could've removed one of the front seats to get it in, but it was then that I realized without any doubt, that using a coupe to tote around young kids was a losing proposition. The very next day a new Accord sedan was sitting in my driveway.