I have a tall baby and am trying to figure out what would be the best option for a convertible car seat. I'm getting conflicting information on both Britax and Diono. Up until recently I had been reading that Britax was a good option for taller children. But I came across a comment this week that the new models have a shorter shell. Had also read some comments on TB that the Diono was a good option for tall babies. However, Amazon reviewers indicated it wasn't working out well for their tall babies. Help! I'd like to be able to maximize the amount of time my daughter can spend rear-facing.