My daughter will be 3 next month and we need to buy her another car seat. We have one GN that she is in now, and I'm really not liking it. She seems to be pretty comfortable, however, it's rather difficult for me to get her in and out of it and I have trouble with the button sticking and not allowing the harness to unbuckle. I finally decided to take her stats and she is 42 lbs, 39 1/2" tall, from bottom to shoulders she's 15 1/2 inches, 23" from bottom to her head. She has a really big head so that also influences our decision. I can't decide if I should buy her a RN XTSL or a Frontier. I definitely know that we don't want another GN. The GN fits perfectly in both our XTerra and Toyota Tundra so it doesn't matter which vehicle it goes in, and the next one we buy can go into either. I'm just confused as what to do right and need to make a decision soon because I'm going back to work in the next few weeks and we will be transporting the kids in both vehicles. Thanks for the help and suggestions.