Hello, our little one is outgrowing her infant car seat so it's time to buy a convertible seat. I've researched and it's a bit overwhelming. I was wondering which seat might be best for our car and child. She is 20 month 22 lbs, overall height is 31" tall. I'm not sure where exactly to measure for seated height- from her bottom to her shoulders is 12.5" and from her bottom to the top of her head is 19". We have a Chrysler Town & Country Touring minivan. Her car seat is in the second row in a captain chair. I'm considering the Britax Advocate, Recaro Performance ride, and the Diono Radian RXT. I'm definite open to any other suggestions. We don't have to worry about the amount of space it takes up or anything and I'm most concerned about safety and comfort. Thank you for your help in this major decision.