In search of a car seat that is comfortable, yet safe and will "grow" with my babe. He is 13 months…

In search of a car seat that is comfortable, yet safe and will "grow" with my babe. He is 13 months and has outgrown his infant car seat. I don't need it to go into or come with a stroller, since we already have a stroller! Please if you guys could give me some suggestions, I would greatly appreciate it. Price tag doesn't matter much, as family members are all chipping in this Christmas for it as a present!