I do not need a convertible car seat yet, just doing some research so I am prepared when we do need to buy one. We have a small SUV and my DD is tall (90th percentile currently) so based on what I have read here and heard from moms IRL I am leaning towards the Diono Radian. I see three different versions, the R100 birth to booster, the R120 birth to booster and the RXT birth to booster. For those of you with this seat, which do you recommend and why? Price is not a deciding factor, the difference is not great enough to push me towards the cheaper one based solely on that. Also, are there any other seats I should be looking at? Thanks!