I was reading a thread on when to switch LO into convertible seats and have been thinking about this recently.

Our DS is only 3 months old, but he's already 26'' tall (14 lbs). I believe our infant seat (Chicco Keyfit 30) is for up to approx 30'' tall, so I don't know how much longer he will be in it (depending on how fast he grows). Does anyone have a good recommendation on a convertible seat for a tall child? We were originally looking at a Britax, but I've also been looking at the Diono.