I am a certified car seat technician. Though I cannot reccomend a seat, I will share my personal experience. I have a Roundabout and a Marathon. Eventhough I drive a Suburban, the marathon is quite large for rear facing. It did not fit well behind the driver's seat. With one child you have the choice to put them in the middle, but if you plan to have more children and use the same seat, think about placement of the different seats in the car. (No matter your child's weight, you should keep her rear facing for AT LEAST 12 months - longer if she is not AT LEAST 20 pounds, preferably up to the weight limit of the seat.) Unless your child is measuring large, I don't think that it is necessary to spend the extra money on the seats that have the higher weight limits. Children can move to booster seats at as little as 30 pounds (highback booster). I waited until 40 pounds to move my children to boosters. My 6 yr old is still not 65 pounds (the maximum weight for Marathon) and she is too tall and would not sit in the "baby" seat. My point is that the seats that seem to fit children longer, are often not necessary because by the time most children pass 40 pounds, they are ready for a booster (many children, especially girls, don't reach 40 pounds until at least Kindergarten). My 3.5 year old is 32 pounds and still in the Roundabout (she also uses the Marathon, but it is not necessary to have a seat w/that capacity). She cannot wait to be in a booster. She has a long time to wait for those 8 pounds. I have babbled on forever, but hope I have helped you. If you have any other car seat questions, I'd be glad to answer.